My natural hair colour is a medium brown. I had it highlighted to blonde and after about 6months decided to dye it bright red. It has been another 6months and decided I really didn't want red hair anymore and dyed it very very dark brown. This is fading and the red is starting to show through again. As you can tell I get bored with my hair colour extremely quickly because I want it to be blonde again. If this is not possible is there at least any way of removing the underlying red pigment? My hair is around 40cm long if this helps.