Complete bleaching fail...save me.

With a darker red it should be ok. If it's not, just apply the dye again and it should saturate enough the second time to hide it. Then in a month you can spot bleach the darker parts if they do start to show with fade.

That is assuming its a direct dye you're using... Can you tell us which dye you're using?

You should have used a color remover instead of bleach. That would have left you with a more even base.

Please do not use any more box dye or anything with peroxide for a few weeks as you have already processed your hair for an hour.

Yes sorry, I managed to totally misread your post. Ignore my last post.

It is almost impossible to bleach out black dye, you need to use a reductive sulphur based colour remover first. (Colour B4 etc) You can still use it after bleaching, it will help to get the darker parts to a lighter shade. You will need to use it more than once on years of black build up. Black is likely to have stained, so after you have got as much of the colour as possible out with colour removers do a strand test to see if it will lighten any further with bleach. If not do not attempt to bleach again, it will just damage your hair unnecessarily, staining is permanent.
If you want an even colour, you will need to use a darker red on the blonde areas and a brighter red where your base is darker. Avoid box dyes, the only dyes that are safe to use on bleached hair are direct dyes such as those sold here. They are totally non damaging and can be mixed to get the exact shade you want.They will also last a lot longer than a box dye on bleached hair.

Get your lighter brighter roots as close as you can to the rest of your hair color....the brownish with orangish non roots. What level is your target color? the Mahogany/brown red?....usually theres a # on the packaging. The first # is the colors base level if theres more #'s, these are the tonal pigments ordered in strength of the secondary tonal values in addition to the base value/level.

Getting the roots to match the rest of your hair color provides an even canvas to get even results with your target color. If you do a root match, shampoo out the root/pre-color & totally dry hair b4 applying your desired/target color so porosity is even & hair will soak up the target color more evenly. Apply target color to roots last as a 30min processing time for a color dedicates the first 10 mins of 30mins, to opening the cuticle which we dont want on freshly matched roots! Get the roots saturated with color after the 10mins so we dont ruin our root match work!