Title: G - Colour-to-colour contrast
Course: EN_Colour theory > Section: 6. Understand contrasts in colour as a principle to work creatively

The colour-in-itself contrast

This contrast is named also colour-to-colour contrast, chromatic contrast or hue contrast occurs as soon as at least three pure, luminous colours that are relatively far apart on the colour wheel meet.

The simplest, strongest and most important contrast is formed by the three primary colours (magenta) red, yellow and (cyan) blue, usually supplemented by green. The colour-aspect contrast generally appears colourful, decisive, cheerful, powerful and loud, often also festive.

As it is a very conspicuous colour contrast, it is used especially in signal boards, flags and warning signs.

In addition, the colour-on-itself contrast can be found in medieval book painting and also in modern painters such as Henri Matisse, Jean Miró, Franz Marc or Wassily Kandinsky.

In webdesign the dominant areas of color are those with attributes that may include a combination of the greatest contrast in hue, value, or chroma with surrounding areas of color.

See some examples on this website under the section "Colour Dominance":
https://www.uxmatters.com/mt/archives/2006/01/color-theory-for-digital-displays-a-quick-reference-part-ii.php