The RAL Design Series 220 Hues are part of RAL Design 220-260 colour range. It contains the colours below.
The RAL DESIGN SYSTEM plus is a precise, three-dimensional colour-matching system developed in 1993 for architects, designers, advertisers, and other creative professionals.
Shades transitioning from neutral greys and blacks through rich browns, deep reds, and soft pinks to light whites
Shades transitioning from brown to orange/yellows.
Shades transition from yellow-hues into green-yellow and green hues.
Shades correspond specifically to Greens.
Shades transitioning from green to turquoise-blue
Shades transitioning from blue-green to blue.
Shades transitioning from deep blues toward blue-purples/violets.
Shades spanning from mauve and purple shades through to pinks.
Colour Count: The system contains 1,825 standardised colours, arranged according to a scientific colour system rather than historical or visual groupings.
Colour Space: It is based on the international CIELAB colour model, which reflects the way the human eye perceives differences between colours.
Structure: The colours are organised within a colour wheel consisting of 39 hue rows, together with a central, non-chromatic grey axis (000). Each colour is defined according to its lightness and chroma.
Each colour is identified by a seven-digit code, such as RAL 180 40 20, which describes its position within the colour system:
First 3 digits – Hue: Identify the colour’s position on the colour wheel, ranging from 000 to 360. For example, 000 represents grey, while 180 represents green.
Middle 2 digits – Lightness: Indicate how light or dark the colour is, ranging from 00 (black) to 100 (white).
Final 2 digits – Chroma: Represent the colour’s saturation or intensity. Higher values indicate a stronger and more vivid colour.
