sRGB is a standard RGB (red, green, blue) color space that HP and Microsoft created cooperatively in 1996 to use on monitors, printers, and the World Wide Web.[2] It was subsequently standardized by the International Electrotechnical Commission (IEC) as IEC 61966-2-1:1999.[1] sRGB is the current defined standard colorspace for the web, and it is usually the assumed colorspace for images that are neither tagged for a colorspace nor have an embedded color profile.

IEC 61966-2-1 Default RGB Colour Space - sRGB
sRGB colors situated at calculated position in CIE 1931 chromaticity diagram. Luminance set so that to avoid bright lines toward primaries' complementary colours.
Year started1996
First publishedOctober 18, 1999; 23 years ago (1999-10-18)[1]
CommitteeTC/SC: TC 100/TA 2[1]
Base standardsIEC 61966 Colour Measurement and Management in Multimedia Systems and Equipment
DomainColor space, color model

sRGB essentially codifies the display specifications for the computer monitors in use at that time, which greatly aided its acceptance. sRGB uses the same color primaries and white point as ITU-R BT.709 standard for HDTV,[3] a transfer function (or gamma) compatible with the era's CRT displays, and a viewing environment designed to match typical home and office viewing conditions.

An amendment of the IEC 61966-2-1 standard document that defines sRGB includes the definition of a number of variants including sYCC, which is a Y′Cb′Cr′ luma-chroma-chroma color representation of sRGB colors with an extended range of values in the RGB domain (supporting negative values in the RGB domain).[4]

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