Bumble and Bumble Bb. Colour Stick If your roots are showing and they're a different colour than your current one, the Bumble and Bumble Bb. Colour Stick ($26) can quickly fix that in brown or black hair. This portable crayon is quick-drying and water-resistant, so the temporary colour stays on your head . . . and doesn't make its way to your forehead or clothing. Image Source: sephora.com Bumble and Bumble Bb. Colour Stick $26 from sephora.com Buy Now