Blonde and brown hair dye are safe to mix. Mixing hair dyes will not change the shade of your hair. It’s just a different way of applying it to the hair.
If you want to dye your hair blonde, apply the dark brown dye on your hair first. Wait for it to set up, then apply the blonde dye on top of it. It’s that simple! If you want to dye your brown hair blonde, do it by mixing the blonde and dark brown dyes. You can also apply both dyes at the same time if you want to create two shades of blonde instead of one. Just remember: never mix red and orange dyes together because they are too strong and will damage your hair.