White

White is a color Color

Color or colour is the visual perceptual property corresponding in humans to the categories... 

  that has high brightness but zero hue Hue

A hue refers to the gradation of color [i] within the visible spectrum [i], or optical spectrum, of light [i] ... 

. The impression of white light Light

Light is electromagnetic radiation [i] with a wavelength [i] that is visible to the eye [i] or, in a technical [i] ... 

 can be created by mixing appropriate intensities of the primary color Primary color

A primary color or colour is a color [i] that cannot be created by mixing other colors in the gamut [i] ... 

 spectrum: red Red

Red is any of a number of similar color [i]s at the lowest frequencies of light [i] discernible by the h ... 

, green Green

Green is a color [i] with many different shades, all within a wavelength [i] of roughly 520570 nm [i]... 

 and blue Blue

Blue is any of a number of similar color [i]s. ... 

, but it must be noted that the illumination provided by this technique has significant differences from that produced by incandescence .

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Timeline

1954   Stop signs are changed from black-on-yellow to white-on-red

Encyclopedia

White is a color Color

Color or colour is the visual perceptual property corresponding in humans to the categories... 

  that has high brightness but zero hue Hue

A hue refers to the gradation of color [i] within the visible spectrum [i], or optical spectrum, of light [i] ... 

. The impression of white light Light

Light is electromagnetic radiation [i] with a wavelength [i] that is visible to the eye [i] or, in a technical [i] ... 

 can be created by mixing appropriate intensities of the primary color Primary color

A primary color or colour is a color [i] that cannot be created by mixing other colors in the gamut [i] ... 

 spectrum: red Red

Red is any of a number of similar color [i]s at the lowest frequencies of light [i] discernible by the h ... 

, green Green

Green is a color [i] with many different shades, all within a wavelength [i] of roughly 520570 nm [i]... 

 and blue Blue

Blue is any of a number of similar color [i]s. ... 

, but it must be noted that the illumination provided by this technique has significant differences from that produced by incandescence .

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