The best at-home hair color brands for professional results and to cover gray, including permanent and semi-permanent dyes for dark brown, blonde and red hair.

With these Wirecutter-approved picks under $100, you don’t have to spend a lot to get a good deal this Amazon Prime Day.

Products in this story may be marked down for Prime Day. Shop our full coverage of the event here — or, dive directly into the deals here.Amazon’s Prime Day starts today, and ICYMI: The deals are ...