scRGB
scRGB is a wide color gamut RGB color space created by Microsoft and HP that uses the same color primaries and white/black points as the sRGB color space but allows coordinates below zero and greater than one. The full range is −0.5 through just less than +7.5.
| IEC 61966-2-2:2003 | |
Intersection of the scRGB gamut with the X+Y+Z=.6443 plane (the gamut varies depending on the intensity as it is a cube with a non-zero origin). | |
| Native name |
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|---|---|
| Status | Published |
| First published | January 23, 2003 |
| Organization | |
| Committee | TC/SC: TC 100/TA 2 |
| Authors | |
| Base standards | sRGB |
| Related standards | Adobe RGB color space |
| Domain | Color space, color model |
Negative numbers enables scRGB to encompass most of the CIE 1931 color space while maintaining simplicity and backward compatibility with sRGB without the complexity of color management. The cost of maintaining compatibility with sRGB is that approximately 80% of the scRGB color space consists of imaginary colors.
Large positive numbers allow high dynamic range images to be represented, though the range is inferior to that of some other high dynamic range formats such as OpenEXR.
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