I just dyed my hair blonde, (yesterday) I hate it & have realized I'm not a blonde its too bright! & I don't want to go and complain because the lady spent so much time doing it. How long should I wait to dye it a light brown?

Everyone is different. Hair can be too porous, not porous enough; have a low tolerance for hair dye. I would suggest you start giving yourself hot oil treatments for a couple of weeks. I use one ounce of a good grade olive oil heated up in the microwave (not boilingt hot, but just warm to the touch) and applied and massaged into hair, then applying a hot towel, leave on for l5 minutes, possibly reheating the towel in hot water and then washing with your favourite shampoo.

Basically, get your hair back in shape before putting another dye on it.

I recommend that you wait for like week or two before you can add any other chemical on your hair.I don't what brand of hair color you use,but I will tell you that any time you want to color your hair do swap test before you apply 2 your hair.

I would say about two weeks because if you do it too soon u will ruin your hair.