Can you dye your hair red if you have blond highlights?

Yes, but you must realize that once you color it red, th blond highlights will be a mOre vivid shade of red than the rest of your hair. To correct this, you should use two different shades of red. One for highlights, one for the rest of your hair. This will ensure the colors are closer to matching. However, doing this at home perfectly is almost impossible. Your best bet would be letting a salon handle it.