colorir

An archaic and now essentially obsolete variant of colorear, rarely if ever seen in modern Spanish outside historical or dialectal texts.

• Los monjes colorían los manuscritos con tintes vegetales. — The monks colored the manuscripts with plant-based dyes.
• Antaño se coloría la lana antes de tejerla. — In the past, wool used to be dyed before it was woven.
• El artesano coloría las vasijas con pigmentos naturales. — The craftsman colored the vessels with natural pigments.

There's no reason to use this today — colorear is the word in active use for every "to color" context a learner will actually encounter.

Often confused with colorear.