Review (3/5): Works in dark hair
While the colors do work in dark hair it was a chore to get in. The cap on the end of the brushes started to come off and the chalk began to crumble. Blue and pink worked best, green not so much. We found it easier to use on dry hair rather than wet. I caution you not to leave it in over night, it made my daughter's hair one big tangle that took some work to get out.