RGB / CIE Color Coordinate Calculator
Use this RGB / CIE Color Coordinate Calculator to convert between RGB, HEX, CIE XYZ, CIE 1931 xyY, and CIE 1976 u′v′ color coordinates. The tool supports relative Y values as well as measured luminance in cd/m² and foot-lamberts, making it useful for display color review, LCD and OLED specification work, chromaticity comparison, and engineering documentation.
RGB / CIE Color Coordinate Calculator
Convert between RGB, HEX, CIE XYZ, CIE xyY, and CIE 1976 u′v′ color coordinates. Supports relative Y, measured cd/m², and foot-lamberts for display measurement documentation.
RGB / HEX Input
CIE Coordinate Input
Calculated Results
CIE 1931 Chromaticity Chart
Current color coordinate plotted against the approximate visible locus, D65 white point, and standard sRGB gamut triangle.
| Reference | Typical sRGB CIE 1931 xy Coordinate | Approx. CIE 1976 u′v′ Coordinate |
|---|---|---|
| D65 White | x 0.3127 · y 0.3290 | u′ 0.1978 · v′ 0.4683 |
| sRGB Red | x 0.6400 · y 0.3300 | u′ 0.4507 · v′ 0.5229 |
| sRGB Green | x 0.3000 · y 0.6000 | u′ 0.1250 · v′ 0.5625 |
| sRGB Blue | x 0.1500 · y 0.0600 | u′ 0.1754 · v′ 0.1579 |
Engineering Note
CIE x/y and u′/v′ describe chromaticity. Y describes luminance. When entering measured display data, use cd/m² or foot-lamberts. The RGB preview is normalized internally because a browser cannot display actual measured luminance such as 500 cd/m².
1 foot-lambert = 3.426 cd/m². The chart location does not change when luminance changes; only the measured brightness value changes.
For real LCD, OLED, MiniLED, or custom backlight systems, final color coordinates should be measured with calibrated equipment because panel, backlight, polarizer, cover glass, optical bonding, and drive settings can shift measured chromaticity.
RGB / CIE Color Coordinate Calculator
Convert between RGB, HEX, CIE XYZ, CIE xyY, and CIE 1976 u′v′ color coordinates. Supports relative Y, measured cd/m², and foot-lamberts for display measurement documentation.
RGB / HEX Input
CIE Coordinate Input
Calculated Results
CIE 1931 Chromaticity Chart
Current color coordinate plotted against the approximate visible locus, D65 white point, and standard sRGB gamut triangle.
| Reference | Typical sRGB CIE 1931 xy Coordinate | Approx. CIE 1976 u′v′ Coordinate |
|---|---|---|
| D65 White | x 0.3127 · y 0.3290 | u′ 0.1978 · v′ 0.4683 |
| sRGB Red | x 0.6400 · y 0.3300 | u′ 0.4507 · v′ 0.5229 |
| sRGB Green | x 0.3000 · y 0.6000 | u′ 0.1250 · v′ 0.5625 |
| sRGB Blue | x 0.1500 · y 0.0600 | u′ 0.1754 · v′ 0.1579 |
Engineering Note
CIE x/y and u′/v′ describe chromaticity. Y describes luminance. When entering measured display data, use cd/m² or foot-lamberts. The RGB preview is normalized internally because a browser cannot display actual measured luminance such as 500 cd/m².
1 foot-lambert = 3.426 cd/m². The chart location does not change when luminance changes; only the measured brightness value changes.
For real LCD, OLED, MiniLED, or custom backlight systems, final color coordinates should be measured with calibrated equipment because panel, backlight, polarizer, cover glass, optical bonding, and drive settings can shift measured chromaticity.