If you bleached your hair and then decided you wanted it dark again would you have to wait for the blonde to grow out or can you just dye a dark colour over it?

You can dye your hair to a darker colour by using a 2 step process. Go to the store and buy a red tone colour (reddish brown, or aburn ) and a light or medium brown hair colour. Stay away from browns in the cool and warm tones, this means no ash or golden tone browns. Buy permanant hair colours not semi or demi hair colours. STEP 1- First you will need to use the red hair colour to use as a filler on the blond hair. If you don't use a filler and just put on a brown hair colour your hair will turn greenish. Leave this red hair colour on for only 15 minutes, rince and condition well. Don't freak out, your hair will be on the pink, orange to red side of tones. Dry your hair and if possible wait a day for step 2 if you absolutly can't wait the day then procede to step 2. STEP 2- Mix the brown hair colour acording to instructions again only leave on 15 minutes, your hair is very porous and will suck up colour very quickly. Rince and condition well. Dry hair and enjoy the new you. If you left the colour on too long and its too dark, you can use dandruff shampoo to remove about 60% of the colour for a week after colouring. Next time you colour you can pick a lighter shade and be happy with the results.