FYI.
I have an expensive gray wool sweater that I accidentally splattered with bleach. Friggin made me sick. I remembered my ex used to dye her work uniforms. I went to Walmart in the laundry detergent isle and there it was, Rit dye.
They had a Pearl Grey. Anyway, long story short, It said it may not work on bleach damaged fabric, so instead of trying to dye the whole thing, I got a Q-tip and blotted all the spots, put it in the dryer and repeated about 4 times.
Boom. Looks brand new.