wax or spray. The chalk and wax usually will be the ones if you want to sport a bolder hair color like pink or blue instead ...

If your hair is naturally darker, consider a gentle pre-lightening treatment to bring out the warm tones; if it's lighter, a semi-permanent dye will let you test the color without a major commitment.

opaque touch-up powder or spray.” —Sami Knight, celebrity hair stylist Concealing grown-out roots of any color can seem challenging, but darker roots tend to be the trickiest to blend.