noun (n)

• the timbre of a musical sound(noun.attribute)

  Synonym:
  color, colour, colouration
  

  source: wordnet30
• appearance with regard to color(noun.attribute)

  Example:
  Her healthy coloration.
  

  Synonym:
  colouration
  

  source: wordnet30
• choice and use of colors (as by an artist)(noun.act)

  source: wordnet30
• The act or art of coloring; the state of being colored.(noun)

  source: webster1913