I get my hair colored at the local beauty school. They use something called Sea Breeze on a cotton ball. Works great. You can buy it at any drug store or Walmart.
The only thing that really works is nail polish remover. I know that sounds terrible, but I use it everytime I get my hair done. Just dip a Qtip or cotton ball or an old washcloth in the remover and gently rub on the areas that are stained by the dye. Don't rub too hard. When you're finished removing the unwanted dye, wash the area with soap and water. Better yet, shampoo the hair. Hope this helps.
There is a product at beauty supply stores (such as Sally Beauty Supply) you can buy made by Clairol called Clean Touch and it's gentle to the skin. Just follow the directions. In the future carefully spread a very thin layer of Vaseline (or other petroleum jelly brand) along his hairline and on his ears. Be sure not to get the jelly 'on the hair' or the color won't take correctly in those spots.
Phone the number on the box of hair dye and speak to someone from the company. They have a help line.
Add your voice to the conversation. Click here to answer this question.