turn one's coat(dated) To change one's allegiance or affiliation (especially in politics) for personal gain or advantage • A good politician will espouse the most hard-line stance of his party's political ideologies, but a successful politician knows when to turn his coat.)
dye again(особ. о волосах); redye(особ. о волосах); change one's hair back to(о волосах • Why did you change your hair back to blonde?); dye(особ. о волосах • You even dyed your hair blonde after you found out that's what he likes.); dye one's hair(особ. о волосах • After the show, she changed her hair color to dark blonde.)