1. noun /ˈkʌlə,ˈkʌlɚ/
a) The spectral composition of visible light
Humans and birds can perceive colour
b) A particular set of visible spectral compositions, perceived or named as a class
Most languages have names for the colours black, white, red and green.
Syn: blee, hue, shade, complexion, ethnicity, race, interest, stain, banner, standard, colour television
2. verb /ˈkʌlə,ˈkʌlɚ/
a) To give something colour.
We could colour the walls red.
b) To apply colours to the areas within the boundaries of a line drawing using coloured markers or crayons.
My son loves to colour.
Wikipedia foundation.