C L S

CIELAB

The CIELAB colour model was defined in 1976 by the Commission Internationale de l’Eclairage and describes all colours that can be perceived. It is a mathematical colour model in which the spectral properties of an object and the perceptual properties of our visual system are set off against each other. CIELAB, or in short: LAB, has become generally accepted until today wherever exact colour calculation is required, whether in colour measurement, colour formulation or in the common operating systems: 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.

Colour location

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 mode (millions of colours)
  • CMYK mode (colours for four-colour printing)
  • Lab/CIELab
  • Index mode (256 colours)
  • Grayscale (256 shades)
  • Bitmap (2 colours: Black or white)

LAB

The CIELAB colour model was defined in 1976 by the Commission Internationale de l’Eclairage and describes all colours that can be perceived. It is a mathematical colour model in which the spectral properties of an object and the perceptual properties of our visual system are set off against each other. CIELAB, or in short: LAB, has become generally accepted until today wherever exact colour calculation is required, whether in colour measurement, colour formulation or in the common operating systems: Colour management usually works via CIELAB.

Spectrophotometer

Spectrophotometers are high-quality colorimeters that can measure and accurately describe any colour.
The measuring instrument achieves this by illuminating the measuring surface with the entire spectrum of the visible light. The remission values of certain wavelengths together give the measured value, often this is output in Lab (measuring mode freely selectable from M0 to M2). The spectral measurements can also be stored directly.

High-quality proof printers have their own spectrophotometers to verify the print directly.

Certified for
Order proofs

You can easily order proofs from our shop:

Contact

Easily compare color spaces and find colors that fit your needs: