SRGB

sRGB

IEC 61966-2-1 Default RGB Colour Space - sRGB
sRGB colors situated at calculated position in CIE 1931 chromaticity diagram. Luminance ${\displaystyle Y}$ set so that ${\displaystyle R+G+B=1}$ to avoid mach bands.
Abbreviation	sRGB
Status	Published
Year started	1996
First published	October 18, 1999; 25 years ago (1999-10-18)[1]
Organization	IEC[1]
Committee	TC/SC: TC 100/TA 2[1]
Base standards	IEC 61966 Colour Measurement and Management in Multimedia Systems and Equipment
Domain	Color space, color model
Website	webstore.iec.ch/publication/6169

sRGB is a standard numerical encoding of colors, based on the RGB (red, green, blue) color space, for use on monitors, printers, and the World Wide Web. It was initially proposed by HP and Microsoft in 1996^[2] and became an official standard of the International Electrotechnical Commission (IEC) as IEC 61966-2-1:1999.^[1] It 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.

The sRGB standard uses the same color primaries and white point as ITU-R BT.709 standard for HDTV,^[3] but a different transfer function (or gamma) compatible with the era's CRT displays,^[4] and assumes a viewing environment closer to typical home and office viewing conditions.

The sRGB color space is also the basis of the sYCC color encoding, which is a remapping of the R, G, and B components of sRGB to a luminance (brightness) value ${\displaystyle Y}$ and two chroma channels similar to those of the CIE YCbCr encoding.^[5]