While blue shampoo is recommended for color-treated brown hair ... you blend it through every inch of your hair, or you may end up with uneven toning — yeah, it's that strong.

If you have coily, dry, highly textured hair or locs, both Lussiano and Freda Brown, a hairstylist and owner of The Loc Shop, a salon in Maryland, recommend using this sulfate-free shampoo.

However, not all blonde toners are created equal. Some are rinse-out, some are leave-in, and some are good, old hair masks.

In layman's terms, it keeps your lightened brown hair from turning that pesky orange-red hue. While blue shampoo is recommended for color-treated brown hair, natural brunettes can also benefit ...