Choose A Root Concealer
If the idea of mixing color and developer and attacking your roots with color is terrifying to you, you can avoid going the semi permanent route with a quality root concealer spray like this choice from Rita Hazan. These waterproof sprays only wash out with shampoo, are free of damaging ammonia and peroxide, and look completely natural. They come in five shades.
Choose A Permanent Solution
Don’t want color to wash out in the bath? Take matters into your own hands with an easy-to-use permanent root touch-up kit like this one from Clairol. The kit is simply to mix and comes with a fool-proof application brush that focuses on roots so you can avoid messing with highlights.
Even if you have a high quality touch-up kit, you’ll want to avoid making one of the most common coloring mistakes: dragging that root color throughout the rest of your hair.
Clairol color director James Corbett of New York’s James Corbett Studio told Goop: “You think you want it all to match, but since the base color for roots isn’t the same as the already-colored part of your hair, they won’t match. Recoloring the whole head is the number one mistake women make when coloring their hair at home.”
Another important tip: always choose a color shade that is slightly lighter than the rest of your hair. Lighter hair around the face is more flattering (think of it as a halo effect). And, unless you are sure that your tone is ash or golden, stick with neutral shades to be safe.