Indiglo is a product feature on watches marketed by Timex , incorporating an electroluminescent panel as a backlight for even illumination of the watch dial.
74-576: The brand is owned by Indiglo Corporation, which is in turn solely owned by Timex, and the name derives from the word indigo , as the original watches featuring the technology emitted a green-blue light. Timex introduced the Indiglo technology in 1992 in their Ironman watch line and subsequently expanded its use to 70% of their watch line, including men's and women's watches, sport watches and chronographs. Casio introduced their version of electroluminescent backlight technology in 1995. The Indiglo name
148-469: A color printer that claims to compensate for the Abney effect was published in 1995. The Abney effect must be taken into account when designing the cockpit for modern fighter planes. The colors viewed on the screen become desaturated when white light strikes the screen, so special considerations are made to counteract the Abney effect. A wide array of spectral colors exist that can be made to exactly match
222-442: A distinct greenish-blue color and evenly light the entire display or dial. Certain Indiglo models, e.g., Timex Datalink USB , use a negative liquid-crystal display so that only the digits are illuminated, rather than the entire display. This product article is a stub . You can help Misplaced Pages by expanding it . This electronics-related article is a stub . You can help Misplaced Pages by expanding it . Indigo This
296-438: A faster response time than the chromatic neural channels under most conditions. The functions of these channels are task-dependent. Some activities are dependent on one channel or the other, while others depend on both channels. When a colored stimulus is summed with a white stimulus, both the chromatic and achromatic channels are activated. The achromatic channel will have a slightly slowed response time, since it must adjust to
370-404: A hue shift is perceived. Correspondingly, if we plot colors that are perceived as having the same hue (and only differing in purity) we will obtain a curved line. In chromaticity diagrams, a line that has constant perceived hue must be curved, so that the Abney effect is accounted for. The chromaticity diagrams that have been corrected for the Abney effect are therefore excellent illustrations of
444-402: A list of colors for the X Window Operating System. The color identified as "indigo" was not the color indigo (as generally understood at the time), but was actually a dark purple hue; the programmers assigned it the hex code #4B0082 . This collection of color names was somewhat arbitrary: Thomas used a box of 72 Crayola crayons as a standard, whereas Ravelling used color swabs from
518-719: A much larger wavelength shift must occur in order for a person to be able to identify a difference in hue. The original article describing the Abney effect was published by Sir William de Wiveleslie Abney in Proceedings of the Royal Society of London, Series A in December 1909. He decided to do quantitative research following the discovery that the visual observations of color did not match the dominant colors obtained photographically when using models of fluorescence. A color-measuring apparatus commonly used in experiments in
592-466: A new method was undertaken by researchers at the University of Nevada. Rather than adding white light to monochromatic light, the bandwidth of the spectrum was varied. This variation of bandwidth directly targeted the three classes of cone receptors as a means of identifying any hue shifts as perceived by the human eye. The overall goal of the research was to determine whether the appearance of color
666-416: A prism to produce a rainbow-like band of colors on the wall. In describing this optical spectrum , Newton acknowledged that the spectrum had a continuum of colors, but named seven: "The originall or primary colours are Red, yellow, Green, Blew, & a violet purple; together with Orang, Indico, & an indefinite varietie of intermediate gradations." He linked the seven prismatic colors to the seven notes of
740-479: A pure color by adding various levels of white light. It remains unknown whether the Abney effect is a resulting phenomenon that occurs by chance during color perception or the effect plays a deliberate function in the way the eye codes for color. The Abney effect is rarely described by known color appearance models. Of the many models Fairchild reviewed in Color Appearance Models (3 ed.), only
814-432: A red-green channel and a yellow-blue channel and transmit color information. The achromatic channel is responsible for luminance, or white-black discrimination. Hue and saturation are perceived due to varying amounts of activity in these neural channels consisting of axon pathways from retinal ganglion cells . These three channels are tied closely to reaction time in response to colors. The achromatic neural channel has
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#1732801620587888-472: A spectral color between blue and violet. However, the article states that Wilhelm von Bezold, in his treatise on color, disagreed with Newton's use of the term, on the basis that the pigment indigo was a darker hue than the spectral color; and furthermore, Professor Ogden Rood points out that indigo pigment corresponds to the cyan-blue region of the spectrum, lying between blue and green, although darker in hue. Rood considers that artificial ultramarine pigment
962-470: A tub and soaked it overnight, and the next day we foamed it up by beating it with a gourd. We let it stand overnight again, and the next day rubbed tallow on our hands to kill the foam. Afterwards, we poured the water off, and the sediment left in the bottom we would pour into a pitcher or crock to let it get dry, and then we would put it into a poke made of cloth (i.e. sack made of coarse cloth) and then when we wanted any of it to dye [there]with, we would take
1036-421: A western major scale , as shown in his color wheel, with orange and indigo as the semitones . Having decided upon seven colors, he asked a friend to repeatedly divide up the spectrum that was projected from the prism onto the wall: I desired a friend to draw with a pencil lines cross the image, or pillar of colours, where every one of the seven aforenamed colours was most full and brisk, and also where he judged
1110-442: Is also known as "deep indigo". The color box on the right displays the web color indigo, the color indigo as it would be reproduced by artists' paints as opposed to the brighter indigo above (electric indigo) that is possible to reproduce on a computer screen. Its hue is closer to violet than to indigo dye for which the color is named. Pigment indigo can be obtained by mixing 55% pigment cyan with about 45% pigment magenta . Compare
1184-468: Is an accepted version of this page Indigo is a term used for a number of hues in the region of blue . The word comes from the ancient dye of the same name . The term "indigo" can refer to the color of the dye, various colors of fabric dyed with indigo dye, a spectral color, one of the seven colors of the rainbow as described by Newton , or a region on the color wheel , and can include various shades of blue, ultramarine , and green-blue. Since
1258-518: Is closer to the point of the spectrum described as "indigo", and proposed renaming that spectral point as "ultramarine". The article goes on to state that comparison of the pigments, both dry and wet, with Maxwell's discs and with the spectrum, that indigo is almost identical to Prussian blue , stating that it "certainly does not lie on the violet side of 'blue.'" When scraped, a lump of indigo pigment appears more violet, and if powdered or dissolved, becomes greenish. Several modern sources place indigo in
1332-406: Is composed of 25.1% red , 0% green and 100% blue . Whereas in a CMYK color space, it is composed of 74.9% cyan , 100% magenta , 0% yellow and 0% black . It has a hue angle of 255.1 degrees, a saturation of 100% and a lightness of 50%. Indigo(color wheel) could be obtained by blending violet with blue . "Electric indigo" is brighter than the pigment indigo reproduced above. When plotted on
1406-404: Is customary to list indigo as a color lying between blue and violet, but it has never seemed to me that indigo is worth the dignity of being considered a separate color. To my eyes, it seems merely deep blue." In 1821, Abraham Werner published Werner's Nomenclature of Colours , where indigo, called indigo blue , is classified as a blue hue, and not listed among the violet hues. He writes that
1480-421: Is equivalent to the web color indigo and approximates the color indigo that is usually reproduced in pigments and colored pencils. The color of indigo dye is a different color from either spectrum indigo or pigment indigo. This is the actual color of the dye. A vat full of this dye is a darker color, approximating the web color midnight blue . The color "electric indigo" is a bright and saturated color between
1554-512: Is not traditionally part of the basic color-naming system . The first known recorded use of indigo as a color name in English was in 1289. Isaac Newton regarded indigo as a color in the visible spectrum , as well as one of the seven colors of the rainbow : the color between blue and violet ; however, sources differ as to its actual position in the electromagnetic spectrum . Later scientists have concluded that what Newton called "blue"
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#17328016205871628-417: Is portrayed using hex code #184FA1 . The 2004 indigo crayon color is depicted by #5D76CB , and the 2019 iridescent indigo is portrayed by #3C32CD . Like many other colors ( orange , rose , and violet are the best-known), indigo gets its name from an object in the natural world—the plant named indigo once used for dyeing cloth (see also Indigo dye ). The color pigment indigo
1702-479: Is repeatedly boiled in an indigo dye bath-solution (boiled and left to dry, boiled and left to dry, etc.), the blue pigment becomes darker on the cloth. After dyeing, the cloth is hung in the open air to dry. A Native American woman described the process used by the Cherokee Indians when extracting the dye: We raised our indigo which we cut in the morning while the dew was still on it; then we put it in
1776-516: Is the color that is called añil in the Guía de coloraciones (Guide to colorations) by Rosa Gallego and Juan Carlos Sanz, a color dictionary published in 2005 that is widely popular in the Hispanophone realm. Marina Warner's novel Indigo (1992) is a retelling of Shakespeare's The Tempest and features the production of indigo dye by Sycorax. The French Army adopted dark blue indigo at
1850-518: The Better Call Saul episode " Hero ", Howard Hamlin mentions that his law firm Hamlin Hamlin & McGill trademarked a colour called "Hamlindigo" whilst confronting Jimmy McGill over trademark infringement in a billboard advertisement he produced for his own legal services. The spiritualist applications use electric indigo , because the color is positioned between blue and violet on
1924-500: The CIE chromaticity diagram , this color is at 435 nanometers, in the middle of the portion of the spectrum traditionally considered indigo, i.e., between 450 and 420 nanometers. This color is only an approximation of spectral indigo, since actual spectral colors are outside the gamut of the sRGB color system. At right is displayed the web color "blue-violet", a color intermediate in brightness between electric indigo and pigment indigo. It
1998-431: The electromagnetic spectrum between 420 and 450 nanometers, which lies on the short-wave side of color wheel (RGB) blue , towards (spectral) violet. The correspondence of this definition with colors of actual indigo dyes, though, is disputed. Optical scientists Hardy and Perrin list indigo as between 445 and 464 nm wavelength, which occupies a spectrum segment from roughly the color wheel (RGB) blue extending to
2072-401: The 1900s was used in conjunction with partially silvered mirrors to split one beam of light into two beams. This resulted in two beams of light parallel to one another having the same intensity and color. The beams of light were projected onto a white background, creating patches of light that were 1.25-inch (32 mm) squares. The white light was added to one of the patches of colored light,
2146-563: The 1990s, this list which came with version X11 became the basis of the HTML and CSS color rendition used in websites and web design. This resulted in the name "Indigo" being associated with purple and violet hues in web page design and graphic design. Physics author John Spacey writes on the website Simplicable that the X11 programmers did not have any background in color theory, and that as these names are used by web designers and graphic designers,
2220-547: The American colonies. Isaac Newton introduced indigo as one of the seven base colors of his work. In the mid-1660s, when Newton bought a pair of prisms at a fair near Cambridge , the East India Company had begun importing indigo dye into England, supplanting the homegrown woad as source of blue dye. In a pivotal experiment in the history of optics , the young Newton shone a narrow beam of sunlight through
2294-508: The Timex Group migrated the microprocessor-controlled, multi-motor, multi-hand technology to its Timex brand in 2012, it created a sub-collection marketed as Intelligent Quartz (IQ). The line employed the same movements and capabilities from the TX brand, at a much lower price-point -- incorporating indiglo technology rather than the super-luminova pigments. Indiglo backlights typically emit
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2368-415: The addition of white light, the colorimetric purity, or the value of P , would be less than one. The purity of a spectral color stimulus can be altered by adding white, black, or gray stimulus. However, the Abney effect describes the change in colorimetric purity by the addition of white light. In order to determine the effect that changing the purity has on the perceived hue, it is important that purity be
2442-430: The addition of white light. Since the experiments undertaken varied the bandwidth of the light, a similar albeit different means of altering the purity and therefore hue of the monochromatic light, the nonlinearity of the results displayed differently from what had traditionally been seen. Ultimately, the researchers came to the conclusion that variations in spectral bandwidth cause postreceptoral mechanisms to compensate for
2516-464: The apparent hue . This hue shift is physiological rather than physical in nature. This variance of hue as a result of the addition of white light was first described by the English chemist and physicist Sir William de Wiveleslie Abney in 1909, although the date is commonly reported as 1910. A white light source can be created by the combination of red, blue, and green light. Abney demonstrated that
2590-487: The best results, although several others are close in color: Japanese indigo (Polygonum tinctoria), Natal indigo ( Indigofera arrecta ), Guatemalan indigo ( Indigofera suffruticosa ), Chinese indigo ( Persicaria tinctoria ), and woad Isatis tinctoria . Indigofera tinctoria and related species were cultivated in East Asia , Egypt , India , Bangladesh and Peru in antiquity. The earliest direct evidence for
2664-399: The calculated values almost exactly. He examined the percentage composition and luminosity found in the different spectral colors as well as the white light source that was added. While the nonlinearity of neural color-coding, as evidenced by the classical understanding of the Abney effect and its use of white light to particular wavelengths of light, has been thoroughly studied in the past,
2738-531: The cause of the apparent change in hue was the red and green light that comprised this light source, and that the blue light component had no contribution to the Abney effect. Chromaticity diagrams are two-dimensional diagrams that plot the projection of the International Commission on Illumination (CIE) XYZ color space onto the (x, y) plane. The X, Y, Z values (or tristimulus values ) are simply used as weightings to create new colors from
2812-502: The color environment is the same, despite aging and other individual physiological factors affecting the retina. Like the Bezold–Brücke effect , the Abney effect suggests a non-linearity between the cone responses (LMS) to the stage of hue perception. The saturation, or degree of paleness of a color, is related to colorimetric purity . The equation for colorimetric purity is: P = L /( L w + L ) . In this equation, L equals
2886-458: The color he called indigo, we would normally call blue; his blue is then what we would name blue-green or cyan ." If this is true, Newton's seven spectral colors would have been: The human eye does not readily differentiate hues in the wavelengths between what are now called blue and violet. If this is where Newton meant indigo to lie, most individuals would have difficulty distinguishing indigo from its neighbors. According to Isaac Asimov , "It
2960-531: The color is composed of " Berlin blue , a little black, and a small portion of apple green," and indicating it is the color of blue copper ore , with Berlin blue being described as the color of a blue jay 's wing, a hepatica flower, or a blue sapphire . According to an article, Definition of the Color Indigo published in Nature magazine in the late 1800s, Newton's use of the term "indigo" referred to
3034-436: The diagram. For instance, brown, which is just low-luminance (and often desaturated) orange, will not appear as such. The Abney effect can be illustrated on chromaticity diagrams as well. If one adds white light to a monochromatic light, one will obtain a straight line on the chromaticity diagram. We might imagine that the colors along such a line are all perceived as having the same hue. In reality, this does not hold true, and
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3108-456: The different luminance; however, despite this delayed response, the speed of the achromatic channel will still be faster than that of the chromatic channel. In these conditions of summed stimuli, the magnitude of the signal emitted by the achromatic channel will be stronger than that of the chromatic channel. The coupling of a faster response with a higher amplitude from the achromatic channel means that reaction time will most likely depend on both
3182-442: The dry indigo. In Sa Pa , Vietnam, the tropical Indigo ( Indigo tinctoria ) leaves are harvested and, while still fresh, placed inside a tub of room-temperature to lukewarm water where they are left to sit for 3 to 4 days and allowed to ferment, until the water turns green. Afterwards, crushed limestone ( pickling lime ) is added to the water, at which time the water with the leaves are vigorously agitated for 15 to 20 minutes, until
3256-403: The filtering effects imposed by cone sensitivities and preretinal absorption and that the Abney effect occurs because the eye has, in a sense, been tricked into seeing a color that would not naturally occur and must therefore approximate the color. This approximation to compensate for the Abney effect is a direct function of the cone excitations experienced with a broadband spectrum. A patent for
3330-434: The long-wave side, towards azure . Other modern color scientists , such as Bohren and Clothiaux (2006), and J.W.G. Hunt (1980), divide the spectrum between violet and blue at about 450 nm, with no hue specifically named indigo. Towards the end of the 20th century, purple colors also became referred to as "indigo". In the 1980s, computer programmers Jim Gettys , Paul Ravelling, John C. Thomas and Jim Fulton produced
3404-400: The luminance and the saturation levels of the stimuli. The customary explanations for color vision explain the difference in hue perception as elemental sensations that are inherent to the physiology of the observer. However, no specific physiological constraints or theories have been able to explain the response to each unique hue. To this end, both the observer’s spectral sensitivity and
3478-429: The luminance of the colored light stimulus, L w is the luminance of the white light stimulus to be mixed with the colored light. The above equation is a way of quantifying the amount of white light that is mixed with the colored light. In the case of pure spectral color , with no white light added, L equals one and L w equals zero. This means colorimetric purity would equal one, and for any case involving
3552-461: The modern word indigo . In early Europe the main source was from the woad plant Isatis tinctoria , also known as pastel. For a long time, woad was the main source of blue dye in Europe. Woad was replaced by "true indigo", as trade routes opened up. Plant sources have now been largely replaced by synthetic dyes . Spanish explorers discovered an American species of indigo and began to cultivate
3626-466: The name indigo has since that time been strongly associated with purple or violet. Spacey writes, "As such, a few programmers accidentally repurposed a color name that was known to civilisations for thousands of years." The Crayola company released an indigo crayon in 1999, with the Crayola website using the hex code #4F49C6 to approximate the crayon color . The 2001 iron indigo crayon
3700-498: The non-linear nature of the visual system. Also, the Abney effect does not disallow any and all straight lines on chromaticity diagrams. One may mix two monochromatic lights and not see a shift in hue, thereby suggesting a straight-line plot for the different levels of mixture would be appropriate on a chromaticity diagram. The opponent process model of the visual system is composed of two chromatic neural channels and one achromatic neural channel. The chromatic channels consist of
3774-422: The now-defunct Sinclair Paints company, resulting in the color list for version X11 of the operating system containing fanciful color names such as "papaya whip", "blanched almond" and "peach puff". The database was also criticised for its many inconsistencies, such as "dark gray" being lighter than "gray", and for the color distribution being uneven, tending towards reds and greens at the expense of blues. In
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#17328016205873848-452: The only variable in the experiment; luminance must be kept constant. The term hue discrimination is used to describe the change in wavelength that must be obtained in order for the eye to detect a shift in hue. An expression λ + Δλ defines the required wavelength adjustment that must take place. A small (< 2 nm ) change in wavelength causes most spectral colors to appear to take on a different hue. However, for blue light and red light,
3922-477: The patch on the right. A rod was inserted in the path of the two beams so that there would be no space in between the colored surfaces. An additional rod was used to create a shadow where the white light scattered onto the patch that was not to receive addition of white light (the patch on the left side). The amount of white light added was determined as one half of the luminosity of the colored light. The red light source, for example, had more white light added than
3996-532: The primary colors, much in the same way that RGB is used for creating colors from primaries in televisions or photographs. The x and y values used to create the chromaticity diagram are created from the XYZ values by dividing X and Y by the sum of X, Y, Z. The chromaticity values that can then be plotted are dependent upon two values: dominant wavelength and saturation. Since luminous energy is not included, colors that differ only in its lightness are not distinguished on
4070-593: The product in Guatemala . The English and French subsequently began to encourage indigo cultivation in their colonies in the West Indies . In North America, indigo was introduced by Eliza Lucas into colonial South Carolina, where it became the colony's second-most important cash crop (after rice). Before the Revolutionary War , indigo accounted for more than one-third of the value of exports from
4144-459: The relative number of cone types have proven to not play any significant role in perceiving different hues. Perhaps the environment plays a larger role in the perception of unique hues than the different physiological features across individuals. This is supported by the fact that color judgments can vary depending on differences in the color environment across long periods of time, but these same chromatic and achromatic judgments are held constant if
4218-409: The spectrum. Abney effect The Abney effect or the purity-on-hue effect is the perceived hue shift that occurs when white light is added to a monochromatic light source. The addition of white light will cause a desaturation of the monochromatic source, as perceived by the human observer. However, a less intuitive effect of the perceived white light addition is the change in
4292-431: The subtractive colors to the additive colors in the two primary color charts in the article on primary colors to see the distinction between electric colors as reproducible from light on a computer screen (additive colors) and the pigment colors reproducible with pigments (subtractive colors); the additive colors are significantly brighter because they are produced from light instead of pigment. Web color indigo represents
4366-601: The term "indigo" since that time. Because of the Abney effect , pinpointing indigo to a specific hue value in the HSV color wheel is elusive, as a higher HSV saturation value shifts the hue towards blue. However, on the new CIECAM16 standard , the hues values around 290° may be thought of as indigo, depending on the observer. Indigo dye is a blue color, obtained from several different types of plants. The indigo plant ( Indigofera tinctoria ) often called "true indigo" probably produces
4440-594: The time of the French Revolution , as a replacement for the white uniforms previously worn by the Royal infantry regiments. In 1806, Napoleon decided to restore the white coats because of shortages of indigo dye imposed by the British continental blockade. However, the greater practicability of the blue color led to its retention, and indigo remained the dominant color of French military coats until 1914. In
4514-448: The traditional colors of the rainbow, the order of which is given by the mnemonics "Richard of York gave battle in vain" and Roy G. Biv . James Clerk Maxwell and Hermann von Helmholtz accepted indigo as an appropriate name for the color flanking violet in the spectrum. Later scientists concluded that Newton named the colors differently from current usage. According to Gary Waldman, "A careful reading of Newton's work indicates that
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#17328016205874588-462: The traditional indigo and violet. This is the brightest color indigo that can be approximated on a computer screen; it is a color located between the (primary) blue and the color violet of the RGB color wheel. The web color blue violet or deep indigo is a tone of indigo brighter than pigment indigo, but not as bright as electric indigo. Listed below are several indigo hues, some of which have included
4662-428: The truest confines of them to be, whilst I held the paper so, that the said image might fall within a certain compass marked on it. And this I did, partly because my own eyes are not very critical in distinguishing colours, partly because another, to whom I had not communicated my thoughts about this matter, could have nothing but his eyes to determine his fancy in making those marks. Indigo is therefore counted as one of
4736-593: The use of indigo dates to around 4000 BC and comes from Huaca Prieta , in contemporary Peru. Pliny the Elder mentions India as the source of the dye after which it was named. It was imported from there in small quantities via the Silk Road . The Ancient Greek term for the dye was Ἰνδικὸν φάρμακον ( indikon pharmakon , "Indian dye "), which, adopted to Latin as indicum (a second declension noun) or indico (oblique case) and via Portuguese , gave rise to
4810-435: The water turns blue. The blue pigment settles as sediment at the bottom of the tub. The sediment is scooped out and stored. When dyeing cloth, the pigment is then boiled in a vat of water; the cloth (usually made from yarns of hemp ) is inserted into the vat for absorbing the dye. After hanging out to dry, the boiling process is repeated as often as needed to produce a darker color. In a RGB color space , "Indigo(color wheel)"
4884-423: The way the color indigo was always reproduced in pigments, paints, or colored pencils in the 1950s. By the 1970s, because of the advent of psychedelic art , artists became accustomed to brighter pigments. Pigments called "bright indigo" or "bright blue-violet" (the pigment equivalent of the electric indigo reproduced in the section above) became available in artists' pigments and colored pencils. 'Tropical Indigo'
4958-477: The web era, the term has also been used for various purple and violet hues identified as "indigo", based on use of the term "indigo" in HTML web page specifications. The word "indigo" comes from the Latin word indicum , meaning "Indian", as the naturally based dye was originally exported to Europe from India . The Early Modern English word indigo referred to the dye, not to the color (hue) itself, and indigo
5032-577: The word "indigo", with the adoption of HTML color names in the World Wide Web era. Indigo dye is a greenish dark blue color, obtained from either the leaves of the tropical Indigo plant ( Indigofera ), or from woad ( Isatis tinctoria ), or the Chinese indigo ( Persicaria tinctoria ). Many societies make use of the Indigofera plant for producing different shades of blue. Cloth that
5106-424: The yellow light source. He began using two patches of red light, and in fact, the addition of white light to the light patch on the right caused a more yellow tone than the pure red light source. The same results happened when the experimental light source was orange. When the light source was green, the addition of white light caused the appearance of the patch to become yellow-green. Subsequently, when white light
5180-402: Was added to yellow-green light, the patch of light appeared primarily yellow. In a mixture of blue-green light (with a slightly higher percentage of blue) with white light, the blue appeared to take on a reddish hue. In the case of a violet light source, the addition of white light caused the violet light to take on a blue tint. Abney hypothesized that the resulting change in hue that occurred
5254-428: Was affected by the filtering effects of the spectral sensitivity of the eye. Experiments showed that the cone ratios signaling a hue were adjusted so as to produce a constant hue that matched the central wavelength of the light source. Also, the experiments conducted essentially showed that the Abney effect does not hold for all changes in light purity, but is limited very much to certain means of purity degradation, namely
5328-413: Was due to the red light and green light that were components of the white light being added. He also thought that the blue light that also comprises the white light beam was a negligible factor that had no effect on the apparent hue shift. Abney was able to prove his hypothesis experimentally by matching his experimental values of percentage composition and luminosities of red, green, and blue sensations to
5402-817: Was later licensed to other companies, such as Austin Innovations Inc., for use on their electroluminescent products. From 2006-2011, the Timex Group marketed a line of high-end quartz watches under the TX Watch Company brand, using a proprietary six-hand, four-motor, micro-processor controlled movement. To separate the brand from Timex, the movements had luxury features associated with a higher-end brand, e.g., sapphire crystals and stainless steel or titanium casework — and used hands treated with super-luminova luminescent pigment for low-light legibility — rather than indiglo technology. When
5476-462: Was what is now called cyan or blue-green; and what Newton called "indigo" was what is now called blue. In the 1980s, programmers produced a somewhat arbitrary list of color names for the X Window computer operating system, resulting in the HTML and CSS specifications issued in the 1990s using the term "indigo" for a dark purple hue. This has resulted in violet and purple hues also being associated with
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