"colouration" in the noun sense
1. color, colour, coloration, colouration
the timbre of a musical sound
"the recording fails to capture the true color of the original music"
2. coloration, colouration
appearance with regard to color
"her healthy coloration"
3. coloration, colouration
choice and use of colors (as by an artist)
Source: WordNet® (An amazing lexical database of English)
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