Colours are defined in many ways, three of the more common ways are:
- RGB (red, green, blue) – which describes the type of light emitted to produce a colour
- HSL (hue, saturation, luminance) – commonly used by artists
- CMYK (cyan, magenta, yellow, black) – used in printing to describe the inks required to produce a given colour
This colour can be defined in the following ways:
RGB(35, 165, 142), HTML traditionally uses hexadecimal conversions of the RGB value to define colour. For example #23A58E
HSL(169.38°, 78.79%, 64.71%)
CMYK(77.75%, 11.45%, 54.28%, 0.34%)
You can use at least one of these methods to define colour in most software packages.
We are constantly improving based on research and best practice. Any significant changes to our guidance are available on the Updates page.