1) Color 2) Coloration 3) Colour 4) French word used in English 5) Quality 6) Timber 7) Timbre 8) Tone 1) Coloration 2) Depigmentation 3) Unpigmented 
A listening term. A visual analog. A 'coloured' sound characteristic adds something not in the original sound. The colouration may be euphonically pleasant, but it is not as accurate as the original signal.