Bleaching your own hair at home can occasionally result in a big mess with uneven colors. You may be left with orange and yellow tones, spots that you missed when applying the color, and lighter or darker spots that weren't saturated enough. There are a few ways to correct this. If you want to do it yourself, an at-home toner kit will help to smooth out the uneven color, or you can try dyeing to another color a shade or two darker to even it out. When all else fails, see a professional.
Wash and deep condition your hair. Leave the deep conditioner on for about 15 minutes to saturate and moisturize the hair before putting any more dyeing products on it. Dry completely.
Wait a day or two for hair to recover from the bleaching. Mix up 1.5 oz. of toner with 3 oz. of 20 volume developer in an applicator bottle. Apply to damp hair, covering it completely. Leave in for no more than 10 minutes. This will tone down any unwanted brassy colors and level out the varying light and darker colors. Choose a toner with a purple or blue base, as this will counteract the yellow and orange tones. Toner and developer are both available at any beauty supply store.
Select a dye one to two shades darker than the color you have now. Apply the dye on the lighter spots first and leave it on for 5 to 10 minutes before putting the dye on the rest of the hair. Do this as an alternative to toning. After your hair is back to one shade, you may attempt to re-bleach it to your desired color.
Be sure to use a deep conditioner once or twice a week, as well as get regular trims to keep split ends away. Take a rest on heat appliances during this process to prevent hair damage. If the above methods fail, see a professional colorist or stylist. A professional will almost certainly be able to help.