The White reference article from the English Wikipedia on 24-Jul-2004
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White

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White is a color (more accurately it contains all the colors of the spectrum and is sometimes described as an achromatic color—black is the absence of color) that has high brightness but zero hue. The impression of white light can be created by mixing (via a process called "additive mixing") appropriate intensities of the primary color spectrum: red, green and blue, but it must be noted that the illumination provided by this technique has significant differences from that produced by incandescence (see below).

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Table of contents
1 Paint
2 White light
3 Standard whites
4 Computers
5 Usage, symbolism, colloquial expressions
6 Color coordinates
7 White in heraldry
8 People whose surname is white
9 Other definitions

Paint

In painting, white can be created by reflecting ambient light from a white pigment. White when mixed with black produces gray.

White light

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 that white was formed by combining the other colors.

In the science of lighting, there is a continuum of colors of light that can be called "white". One set of colors that deserve this description are the colors 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

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 illuminants. Illuminant D65, originally corresponding to a color temperature of 6,500 K, is taken to represent standard daylight.

Computers

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.

Usage, symbolism, colloquial expressions

Color coordinates

hex triplet:#FFFFFF


{| style="margin:0 auto;" id=toc align=center |align=center| Colors | List of colors

White | Gray | Black
Red | Orange | Yellow | Green | Blue | Indigo | Violet
Aquamarine | Brown | Gold | Coral | Crimson | Cyan | Magenta | Maroon | Navy blue | Ochre | Pink | Purple | Tan


White in heraldry

Arthur Charles Fox-Davies has argued that white can be considered a tincture in heraldry separate from its use to represent argent, and in fact the labels borne on the arms, crests and supporters of members of the British Royal Family other than the reigning sovereign are invariably shown as white.

People whose surname is white


Other definitions