Longman Dictionary of Contemporary English
colourist
noun
EXAMPLES FROM CORPUS
▪ As a multi-skilled employee, her shifts involve chemical analysis, production monitoring and work as a colourist.
▪ The window was designed by C.E. Kempe, a leading Victorian stained glass colourist and designer.
▪ There are 14 different shades which can be inter-mixed by your colourist to achieve any colour.
▪ They forget that Picasso was a brilliant draughtsman, composer, colourist.
Wiktionary
colourist
n. 1 One who colours; an artist with a talent for colouring 2 A hairdresser who is a specialist in colouring and tinting hair.
Usage examples of "colourist".
It is truly astonishing what a great range of shades can thus be dyed by using two or three dyes suitably mixed together, and one of the things which go to making a successful dyer and colourist is the grasping of this fact by careful observation, and working accordingly.
There is a clearness of atmosphere, a strength of _chiaro oscuro_, a massiveness in the foliage, and a brilliance of contrast, that must make a colourist of any one who has an eye.