11.   My favourite colour is purple.

12.   Pale colours are in.

13.   Poppy oil colours are short and buttery and slower-drying than linseed colours.

14.   Similarly he came to the unusual conclusion that, since colours are simply visible species, all colours must have equal validity.

15.   Soft colours are easy on the eye.

16.   Strong colours are very fashionable at the moment.

17.   The colour is evident even under low magnification.

18.   The colour is white, to denote an absolute beginner.

19.   The colours are very similar, but I like this one best.