Colourant

A colourant (British spelling) or colorant (American spelling) is something added to something else to cause a change in colour. Colourants can be:

• Dyes
• Pigments
• Biological pigments
• Inks
• Paint
• Coloured chemicals
• Food colourings

For example, colourants could be adding white to tint a paint, or black to shade a paint, ultimately changing the colour or value.