Learn English – Word that means “to change color”

Turn is the verb commonly used to indicate a change in state, conditions of someone or something:

• [ L, I or T usually + adv/prep ] to (cause to) become, change into, or come to be something:

  • The weather has suddenly turned cold.
  • When I refused to pay, he turned nasty.
  • She turned pale and started to shiver.
  • By the end of September, the leaves have started to turn (= become brown).

Cambridge Dictionary

• Russian river turned red by metallurgical waste, Norilsk Nickel says.

From: CNN.com