Which hair color touches up roots best?

Keeping up with hair color can add up to hundreds, even thousands of dollars a year.

Root touch-up products can come to the rescue, helping stretch the time between full colorings. Consumer Reports put several to the test, finding out how well they cover gray and how well they match hair color.

Testers found most worked well.

The particularly liked Oscar Blandi Pronto Color for $23.

A close runner-up was the Roux Tween Time for $8.