pigment

As nouns the difference between pigment and quinacridone

is that pigment is pigment while quinacridone is (chemistry) an organic compound, a red powder with the molecular formula c₂₀h₁₂n₂o₂, used as a pigment.

As nouns the difference between pigment and bilin

is that pigment is any color in plant or animal cells while bilin is any of various biological pigments formed in many organisms as a metabolic product of certain porphyrins.

As a verb pigment

is to add color or pigment to something.