This page shows colors arranged in different color spaces.

CIELAB

CIE L*a*b* is a color space specified by the International Commission on Illumination (CIE) in 1976

CIELUV

CIE L*u*v* is a color space specified by the CIE in 1976.

CIECAM02

CIECAM02 is a color space specified by the CIE in 2002.

IPT

IPT is a color space proposed by Ebner & Fairchild in 1998.

Oklab*

A modified version of the Oklab color space developed by Björn Ottosson. In this version the L value is scaled by a factor of 100 and the chroma value by 250.

ICtCp*

A modified version of the color space developed by Dolby Labroratories. In this version it's assumed that the monitor has a peak white of 200 cd/m² and this brightness is represented by an I value of 100. The chroma value is scaled by a factor of 150.

Y'CbCr

The color space used in analog and digital video (the digital version is called Y'CbCr). The prime symbol after the Y means its derived from non-linear (gamma-corrected) signal values. It's simply a rotation of the RGB cube.

HSV

This is a projection of the RGB cube into a cylindrical coordinate system.

All spaces are expressed in cylindrical coordinates. The first is lightness/luma/value, the second is chroma/saturation and the third is the hue angle. Shown in the diagram are colors of two hues. The right side shows the selected (in the range from 0 to 180°) hue. The left side shows the opposite hue (+ 180°).

sRGB or Display-P3 can be selected as target color space. This will control the conversion of the appearance-based models to RGB values. Display-P3 provides a larger gamut, obviously.

For CIECAM02 the assumed viewing conditions are a dim surround, an adapting luminance of 20 nits, and complete adaptation.

The background color can be entered as a single number, which will be interpreted as the lightness/luma/value of the selected model. If left blank, the background lightness will be the center of the lightness axis.

One can pick and collect colors in a list by clicking on the color patches.