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This article is about the color. For other uses, see White (disambiguation).
| White | ||
|---|---|---|
| — Commonly represents — | ||
| lack, snow, purity, ice, peace, nothing, frost, and air | ||
| | ||
| Hex triplet | #FFFFFF | |
| B | (r, g, b) | (255, 255, 255) |
| HSV | (h, s, v) | (-°, 0%, 100%) |
| Source | By definition | |
| B: Normalized to [0–255] (byte) | ||
White is the combination of all the colors of the visible light spectrum.http://www.physicsclassroom.com/Class/light/u12l2a.html#white. White is technically achromatic, and not a color, since it has no hue.
The impression of white light can be created by mixing appropriate intensities of the primary colors of light — red, green and blue — a process called additive mixing, but the illumination provided by this technique has significant differences from that produced by incandescence.
In nature, white results when transparent fibers, particles, or droplets are in a transparent matrix of a substantially different refractive index. Examples include classic "white" substances such as sugar, foam, pure sand or snow, cotton, clouds, and milk. Crystal boundaries and imperfections can also make otherwise transparent materials white, as in the milky quartz or the microcrystalline structure of a seashell. This is also true for artificial paints and pigments, where white results when finely divided transparent material of a high refractive index is suspended in a contrasting binder. Typically paints contain calcium carbonate and/or synthetic rutile with no other pigments if a white color is desired.
The word white comes from the Common Germanic hwitaz though the Old English word hwīt.Harper, Douglas (Nov 2001). Online Etymology Dictionary. Retrieved on 2008-01-29. The word designates the perception of light containing equal amounts of all wavelengths in the visible spectrum.
In painting, white can be crafted by reflecting ambient light from a white pigment, although the ambient light must be white light, or else the white pigment will appear the color of the light. White when mixed with black produces gray. To art students, the use of white can present particular problems, and there is at least one training course specializing in the use of white in art. In watercolor painting, white areas are the absence of paint on the paper. There are also speculations about the use of white and other colors.
Until Newton\'s work became accepted, most scientists believed that white was the fundamental color of light; and that other colors were formed only by adding something to light. Newton demonstrated this was not true by passing white light through a prism, then through another prism. If the colors were added by the prism, the second prism should have added further colors to the single-colored beam. Since the single-colored beam remained a single color, Newton concluded that the prism merely separated the colors already present in the light. White light is the effect of combining the visible colors of light in equal proportions.
In the science of lighting, there is a continuum of colors of light that can be called "white". One set of colors that deserves this description is the color emitted via the process called incandescence, by a black body at various relatively-high temperatures. For example, the color of a black body at a temperature of 2848 kelvins matches that produced by domestic incandescent light bulbs. It is said that "the color temperature of such a light bulb is 2848 K". The white light used in theatre illumination has a color temperature of about 3200 K. Daylight has a nominal color temperature of 5400 K (called equal energy white), but can vary from a cool red up to a bluish 25,000 K. Not all black body radiation can be considered white light: the background radiation of the universe, to name an extreme example, is only a few kelvins and is quite invisible.
Standard whites are often defined with reference to the International Commission on Illumination\'s (CIE\'s) chromaticity diagram. These are the D series of standard illuminating. CIE standard illuminant D65, originally corresponding to a color temperature of 6,500 K, is taken to represent standard daylight.
Computer displays often have a color temperature control, allowing the user to select the color temperature (usually from a small set of fixed values) of the light emitted when the computer produces the electrical signal corresponding to "white". The RGB coordinates of white are (255, 255, 255).
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The White House, the residence of the President of the United States.
| Web colors | |||||||||||||||||
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| black | gray | silver | white | red | maroon | purple | fuchsia | green | lime | olive | yellow | gold | orange | blue | navy | teal | aqua |
| Shades of white | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cosmic latte | Cream | Ivory | Magnolia | Old lace | Seashell | White | |||
| Shades of grey | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Grey | Arsenic | Bistre | Black | Charcoal | Davy\'s grey | Feldgrau | Liver | Payne\'s grey | Seal brown |
| Silver | Slate grey | Taupe | Purple taupe | Medium taupe | Taupe grey | Pale taupe | White | ||
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