Promising review: "I got this cleansing conditioner after falling in love with my oVertone color-treated hair. I wanted to keep my colored hair without breaking the bank, and this was a cheaper alternative.
PROS: It works. About once every other week, I apply it to dry hair, let it sit in a shower cap for about an hour, then rinse and blow dry. In between the more intensive treatment, I apply it to dry hair, wait 10 minutes, rinse, and blow dry. I have light brown, untreated/undyed hair, and the teal turns it a pretty steely-blue color. Keep in mind this is a saturating mask, not a dye, so the results will start out more subtle and increase the more times you apply it. It's one of the more cost effective coloring conditioners on the market. It leaves my hair feeling clean and soft." —Ashley
Get it from Amazon for $22 (available in two sizes and 18 colors).
Find more Keracolor products on Amazon.