Okay so two days ago I box dyed my hair with Splat dye and I did it pink, but my hair is brown so that turned it to a really pretty fusia. Last night I washed it in cold water and with conditioner and when I woke up parts of my hair were faded and those pieces look like the color it was before, but my roots and underneath stayed the same. Idkkk what to do to fix it because i want to keep it the fusia color for a while! If anyone knows what to do please help!!!

Before:

After: