Device-independent colour space for displaying almost all visible colors. The CIELAB colour space is used as a reference colour space for colour management systems.

Colours are measurable

The colours are perceptionally equally spaced. This means that colour differences which are perceived by the human observer as equally large are also equally large in number. Each colour in the CIELAB colour space can be defined exactly by three values: L=Luminance, a=Red-green value, b=Yellow-blue value.

CIELAB colour values can be converted to RGB colour values and vice versa.

The CIELAB colour space as reference colour space for RGB and CMYK

Technical terms for C