CIELAB

C L S

CIELAB or LAB is a mathematical colour model that has become established wherever exact colour calculations are required. Computer colour management usually works via CIELAB.

Colour distance

The measured distance (colour difference) between two colours. The colour locations of the two colour values are displayed within a system and the difference is given in Delta-E.

The colour location describes the position of a measured or selected colour within a colour space. This is often defined by coordinates, e.g. using L, a and b in the CIELab colour space.
The set of all the colour locations in a colour space is called the colour gamut (or gamut).

Colour mode

The colour mode is a setting that determines the depth to which colours can be displayed in an image file. This also affects the size of the file.
The most common colour modes are RGB, CMYK, Lab, Index mode, Greyscale and Bitmap.

LAB

CIELAB or LAB is a mathematical colour model that has become established wherever exact colour calculations are required. Computer colour management usually works via CIELAB.

Spectrophotometer

Spectrophotometers are high-quality colorimeters that can measure and accurately describe any colour.