Yes, coloured is a Scrabble word!

Adjective

1. Having color or a certain color; sometimes used in combination

2. Favoring one person or side over another

3. (used of color) artificially produced; not natural

4. Having skin rich in melanin pigments

Verb

1. Modify or bias

2. Decorate with colors

3. Give a deceptive explanation or excuse for

4. Affect as in thought or feeling

5. Add color to

6. Change color, often in an undesired manner