definition of
colouration

[1] #1 colouration n. [color, colour, coloration] the timbre of a musical sound; "the recording fails to capture the true color of the original music". wn

[2] #2 colouration n. [coloration] appearance with regard to color; "her healthy coloration". wn

[3] #3 colouration n. [coloration] choice and use of colors (as by an artist). wn