Amber is an orange-yellow color that got its name for the material known as an amber. It is famous for being a color used in traffic lights. VT220 terminals were also available in amber.

Symbolism

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Amber is a symbolic color of energy.

Formal definition

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In automotive lighting, UNECE Regulations state that direction-indicator lamps and standalone side-marker lamps and reflectors on vehicles must be amber. The color is defined in terms of the CIE 1931 color space as follows:

Limit towards green	$y\; \backslash le\; x\; -\; 0.120$
Limit towards red	$y\; \backslash ge\; 0.390$
Limit towards white	$y\; \backslash ge\; 0.790\; -\; 0.670\; x$

The entirety of this definition lies outside the gamut of the sRGB color space — such a pure color cannot be represented using RGB primaries. The color swatch to the right is a desaturated approximation, created by taking the centroid of the standard definition and moving it towards the D65 white point, until it meets the sRGB gamut triangle.

References

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• UNECE Regulation No. 6: Uniform Provisions Concerning the Approval of Direction Indicators for Motor Vehicles and their Trailers (E/ECE/324-E/ECE/TRANS/505/Rev.1/Add.5/Rev.3/Amend.2)^**
• UNECE Regulation No. 48: Uniform Provisions Concerning the Approval of Vehicles with Regard to the Installation of Lighting and Light-Signalling Devices (E/ECE/324-E/ECE/TRANS/505/Rev.1/Add.47/Rev.3/Amend.2)

Shades of yellow | Shades of orange | Ambra (colore) | amber (kleur) | bursztyn (kolor) | Hổ phách (màu) | Âmbar (cor)