Final answer:
The three basic types of lighteners used by colorists are bleach, permanent color, and semi-permanent color.
Step-by-step explanation:
The three basic types of lighteners used by colorists are bleach, permanent color, and semi-permanent color. Bleach is a chemical lightener that can lighten the hair by removing its natural pigment. Permanent color works by chemically altering the hair's structure, while semi-permanent color washes out over time.