What is Colour ?
Colour is (noun) 1. the shade which an object has in light (red, blue, yellow, etc.) What colour is your bathroom? I don’t like the colour of the carpet. His socks are the same colour as his shirt. 2. not black or white The book has pages of colour pictures. 3. the shade of a person’s skin People must not be discriminated against on grounds of sex, religion or colour. 4. with flying colours with great success She passed her test with flying colours.(verb) to add colour to something The children were given crayons and told to colour the trees green and the earth brown. (NOTE: [all senses] The US spelling is color.)
source: Easier English, Student Dictionary Upper Intermediate Level