How to calculate gamut coverage percentage?

Our tool uses CIE 1931 xy coordinates to calculate the overlapping area between your device's RGB primaires and standard color spaces like sRGB or DCI-P3.

Why is 100% sRGB equal to 70.8% NTSC?

In the CIE 1931 xy system, the geometric area of the sRGB triangle is exactly 70.82% of the NTSC 1953 standard triangle.

Interactive Color Gamut Coverage Calculator

Reference Gamut

Red x/y:

Green x/y:

Blue x/y:

Device(Input) Gamut

Red x/y:

Green x/y:

Blue x/y:

Results

Gamut Ratio: --

Gamut Coverage: --

Technical Note: This calculator computes color gamut metrics based on the CIE 1931 xy color space. The Gamut Ratio represents the total geometric area of the device triangle relative to the reference standard, while Gamut Coverage measures the specific overlapping area within the reference boundaries. Please note that results are derived from pure coordinate geometry, which may slightly differ from marketing approximations used in consumer displays.

Standard Color Gamut Coordinates (CIE 1931)

Color Space	Red (x, y)	Green (x, y)	Blue (x, y)	White Point (D65)
NTSC (1953)	0.6700, 0.3300	0.2100, 0.7100	0.1400, 0.0800	0.3101, 0.3162
sRGB / Rec.709	0.6400, 0.3300	0.3000, 0.6000	0.1500, 0.0600	0.3127, 0.3290
DCI-P3 (Display)	0.6800, 0.3200	0.2650, 0.6900	0.1500, 0.0600	0.3127, 0.3290
Adobe RGB (1998)	0.6400, 0.3300	0.2100, 0.7100	0.1500, 0.0600	0.3127, 0.3290
BT.2020 / Rec.2020	0.7080, 0.2920	0.1700, 0.7970	0.1310, 0.0460	0.3127, 0.3290

Note: The coordinates above are defined by CIE 1931 xy chromaticity standards. These values serve as the mathematical foundation for calculating gamut coverage and area ratios.