Red
Chlorophyll a is the most abundant pigment and it is the pigment that reflects green.
The pigment which determines skin color is melanin.
Chlorophyll a is the most abundant pigment and it is the pigment that reflects green.
Purple and Red
Most likely chlorophyll (but not always) and it will be green.
Most likely chlorophyll (but not always) and it will be green.
Most of them are translucent or white. They're too small for pigment, really.
Green
Anthocyanin is the pigment that give blue and red potatoes their color. The pigment ranges in color from red to purple to blue.
The generic term is "pigment". Exactly what the pigment is depends on what color paint it is.
Pigment or pigments.