# sRGB

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.

Abbreviation Standard RGB sRGB colors situated at calculated position in .mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}CIE 1931 chromaticity diagram. Luminance ${\displaystyle Y}$ set so that ${\displaystyle R+G+B=1}$ to avoid bright lines toward primaries' complementary colours. sRGB Standard RGB IEC 61966-2-1:1999 Published October 18, 1999; 22 years ago[1] IEC[1] TC/SC: TC 100/TA 2[1] Color space, color model webstore.iec.ch/publication/6169

sRGB uses the same color primaries and white point as ITU-R BT.709, the standard for HDTV.[3] However sRGB does not use the BT.709 nonlinear transfer function (sometimes informally referred to as gamma). Instead the sRGB transfer function was created for computer processing convenience, as well as being compatible with the era's CRT displays. An associated viewing environment is designed to match typical home and office viewing conditions. sRGB essentially codifies the display specifications for the computer monitors in use at that time.

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]