The official DAZ textures really don't look natural with anything but brunette hair. They do sell other textures that look better with other hair colors.

You can also look for textures that have trans-only lashes and brows (Cin's Leanansidhe and Nicodemus at PoserPros, for example. They're Pro Club, so they're really cheap.) You can change the colors of your lashes and brows just by changing the material color with textures like that, and so match any color hair, even fantasy colors like green or pink.