Bleach them again. 1 gallon of cold water, 1-2 tablespoons of bleach, soak them for up to a half hour stirring every minute for the first five, then again every five minutes. They won't ever get white again, but you should be able to get them light pink enough to attempt to re-dye them grey.
If they don't lighten up enough, rinse them thoroughly and repeat the process. Always use cold water, hot water deactivates the bleach.
I've salvaged many a pair of gloves I dyed too dark for ROTJ or SE that way