colourists

/K AH0 L R IH1 S T S/
noun
  1. 1

    One who colours; an artist with a talent for colouring

  2. 2

    A hairdresser who is a specialist in colouring and tinting hair.

Source: https://en.wiktionary.org/wiki/colourist, https://en.wiktionary.org/wiki/colourists