col·or·ist /ˈkʌlərɪst/
  善用色彩者;五彩畫家
  Col·or·ist n.  One who colors; an artist who excels in the use of colors; one to whom coloring is of prime importance.
     Titian, Paul Veronese, Van Dyck, and the rest of the good colorists.   --Dryden.
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  colorist
       n : a painter able to achieve special effects with color