UK and ANZ, [US and ANZ] coloring [noun] [U]Colouring is the combined effect of a person's hair, skin and eye colour.Their colouring is so totally different that you would never think they were sisters.Colourings are substances that are added to food or drink to change its colour artificially.It says on the label that no preservatives or artificial colourings have been added.
COLOURING
Meaning of COLOURING in English
Cambridge English vocab. Кембриджский английский словарь. 2012