Be sure to saturate your roots with color. Once you've done applying the color, leave it one for 10 minutes. Tip: For resistant grays or for lighter blonde shades, leave on for an additional 5 minutes. 1 / When time is up, rinse.

It's best to shampoo no sooner than 24 hours before applying color. Make sure to follow the instructions in the kit to see if it should go on dry or damp hair.

to three weeks Clairol Permanent Root Touch-Up In just 10 minutes, it covers 100 percent of grays and lasts up to three weeks! Plus, they have the largest root shade palette available in the market, so you are sure to find a color that works for you whether you color at home or at the salon!

Shvonne says to always, “Go a little darker. Because this shade is meant to be used on the root area, it should be slightly deeper than the mid-lengths and ends. Choosing a darker shade for the root will be most natural and avoid the look of hot roots.”

Avoid Washing for 48 Hours “If you wash it before then, there's a chance the color will fade,” Renegar warns. It also goes without saying that you should avoid getting hair wet in hot tubs or pools, which is even worse!

"If you leave your color on for too long, there is potential for extra deposit of pigment to occur. You can't make your hair too light by leaving a tint color on too long (unless you're bleaching), but it can make your hair darker than intended," says Tardo.

As it turns out, most hair dyes are designed to work better on hair that is not freshly washed. Skipping a wash allows for oils to build up on your scalp, which in turn helps protect against irritation that can be caused by hair dye.

The hair dye chemicals can strip your hair of its natural oils and proteins, making it dry and brittle. This can cause split ends and breakage, especially if you use harsh hair dyes or if you leave the hair dye on for too long.

Try Shadow Roots Less hair coloring means less damage for brittle hair. Plus, it saves you money! Shadow roots have another benefit: they add dimension. By adding a slightly darker shade at the roots, this color for thinning hair creates the appearance of more volume.

Choose the right shade of hair color Your root touch up hair color cannot be darker or lighter than the color of the lengths of your hair. It will make the hair color look shabby and inconsistent. If you're covering your greys during your root touch up, remember to choose a color that is one shade lighter.

And how long does root touch up last? Yes, Airbrush washes out, and it'll only last until you next wash your hair. For a longer-lasting solution, try our range of Permanent Hair Colour to give 100% grey coverage using our gentle, ammonia-free formula.

Avoid Washing for 48 Hours Celebrity stylist Cody Renegar says this helps the pigment settle into your hair. “If you wash it before then, there's a chance the color will fade,” Renegar warns. It also goes without saying that you should avoid getting hair wet in hot tubs or pools, which is even worse!