Color

thumb|upright=1.3|Colored pencils

portion of the electromagnetic spectrum that is visible to the human eye

color used in designing web pages

sets of colors that can be combined to make a useful range of colors

polygenic phenotypic character

greenish blue color, based on the gem of the same name

thumb|upright=1.25|Iridescence in soap bubbles

thumb|right|All colors on this color wheel should appear to have the same lightness and the same saturation, differing only by hue.

thumb|The red stripe exhibits higher brightness and colorfulness in the light than in the shadow, but is seen as having the same object color, including the same chroma, in both areas. Because the brightness increases proportionately to the colorfulness, the stripe also exhibits similar saturation in both areas. thumb|7.5PB and 10BG Munsell hue pages of RGB colors, showing lines of uniform saturation (chroma in proportion to lightness) in red. Lines of uniform saturation radiate from near the black point, while lines of uniform chroma are vertical. Also compared to the 10BG colors, the 7.5PB c

pairs of colors which, when combined, cancel each other out

property of light sources related to black-body radiation

thumb|Leaves change color in the fall because their chromophores (chlorophyll molecules) break down and stop absorbing red and blue light.

television transmission technology

principles to describe the practical behavior of colors

thumb|1883 reconstruction of color scheme of the entablature on a [[Doric temple]]

abstract illustrative organization of color hues

the situation where color is created by mixing the visible light emitted from differently colored light sources

adjustment of the intensities of the colors

specific colours used for vestments and hangings within the context of Christian liturgy

methods of visualizing information by translating to colors

abstract mathematical model describing the way colors can be represented as tuples of numbers

mixing of paints, dyes, inks, and natural colorants

thumb|Chromaticity Diagram of the LCH color space

color made by mixing two primary colors

1810 book by Johann Wolfgang von Goethe

thumb|Black-and-white monochrome: the Eiffel Tower during the 1889 Exposition Universelle thumb|Color monochrome: night-vision devices usually produce monochrome images, typically in shades of green. thumb|right|A photograph of a macaw rendered with a monochrome palette of a limited number of shades thumb|A Philips branded [[digital audio player with a monochrome display and green backlight, common on older devices including mobile phones and handheld game systems]]

unexposed color photographic film in a format suitable for use in a motion picture camera

240px|right|thumb|Typical cathode-ray tube (CRT) gamut The grayed-out horseshoe shape is the entire range of possible chromaticities, displayed in the [[CIE 1931 chromaticity diagram format (see below). The colored triangle is the gamut available to the sRGB color space typically used in computer monitors; it does not cover the entire space. The corners of the triangle are the primary colors for this gamut; in the case of a CRT, they depend on the colors of the phosphors of the monitor. At each point, the brightest possible RGB color of that chromaticity is shown, resulting in the bright Mach

method that uses media capable of representing colors

mixture of a color with white, black or gray

measurement device for objective color measurements

name assigned to the average color of the universe

frame|right|Three hues in the Munsell color model. Each color differs in value from top to bottom in equal perception steps. The right column undergoes a dramatic change in perceived color.

controlled conversion between the color representations of various devices

measure of the ability of a light source to reproduce the colors in comparison with an ideal or natural light source

color evoked by a single wavelength of light in the visible spectrum

family of colors

philosophical thought experiment: “a brilliant scientist has investigated the neurophysiology of vision from a black and white room via a black and white monitor; will she learn anything new if she is given a color monitor?”

Chromotherapy, sometimes called color therapy, colorology or cromatherapy, is a pseudoscientific form of alternative medicine which proposes certain diseases can be treated by exposure to certain colors. Its practice is considered to be quackery. Chromotherapists claim to be able to use light in the form of color to balance "energy" lacking from a person's body, whether it be on physical, emotional, spiritual, or mental levels. For example, they thought that shining a colored light on a person would cure constipation. Historically, chromotherapy has been associated with mysticism and occultism

perceived matching of colors that, based on differences in spectral power distribution, do not actually match

production of colour by microscopically structured surfaces, both as a natural phenomenon and in technology

thumb|Threshold increment versus background luminance for various target diameters (in arcmin). Data from tables 4 and 8 of Blackwell (1946), plotted in Crumey (2014). The flat curves at low light indicate Eigengrau. thumb|An example of noise observed in the dark thumb|Another example of noise observed in the dark Eigengrau (German for 'intrinsic gray'; ), also called Eigenlicht (Dutch and German for 'intrinsic light'), dark light, or brain gray, is the uniform dark gray background color that many people report seeing in the absence of visible light.

In organic chemistry, an auxochrome () is a group of atoms attached to a chromophore which modifies the ability of that chromophore to absorb light. They themselves fail to produce the colour, but instead intensify the colour of the chromogen when present along with the chromophores in an organic compound. Examples include the hydroxyl (), amino (), aldehyde (), and methyl mercaptan groups ().

water color in different conditions

Contracted from the term micro reciprocal degree, the mired () is a unit of measurement used to express color temperature. Values in mireds are calculated by the formula: M = \frac{1\,000\,000 \,\text{K{T}, where T is the colour temperature in units of kelvins and M denotes the resulting mired dimensionless number. The constant is one million kelvins.

paradox arising from an incorrect proof by mathematical induction

rotating disc with segments in rainbow colours that appears as white or grey when spun fast

thumb|Luminance only, Chrominance only, and full color image. Chrominance (chroma or C for short) is the signal used in video systems to convey the color information of the picture (see YUV color model), separately from the accompanying luma signal (or Y' for short). Chrominance is usually represented as two color-difference components: U = B′ − Y′ (blue − luma) and V = R′ − Y′ (red − luma). Each of these different components may have scale factors and offsets applied to it, as specified by the applicable video standard.

Film Photo colorisation

right|thumb|250px|The CIE 1931 color space|CIE 1931 xy chromaticity space, also showing the chromaticities of black-body light sources of various temperatures, and lines of constant correlated color temperature

video having a dynamic range greater than that of standard-dynamic-range video

enhancing the color of a motion picture, video image, or still image

A colourant/colour additive (British spelling) or colorant/color additive (American spelling) is a substance that is added or applied in order to change the color of a material or surface. Colourants can be used for many purposes including printing, painting, and for colouring many types of materials such as foods and plastics. Colourants work by absorbing varying amounts of light at different wavelengths (or frequencies) of its spectrum, transmitting (if translucent) or reflecting the remaining light in straight lines or scattered.

color that cannot be perceived under ordinary viewing conditions

theoretical source of visible light

Perception of color mixtures

optical illusion that a color may appear different depending on its relation to adjacent colors