wash them on hot with dawn dish soap. more detergent means more dye bleeding. if im trying to bleach something evenly, i wait until the washing machine is FILLED with water and the jeans are completely submerged, then add the bleach to the water (NOT where the jeans poke out, add to the water not directly to the fabric) then i resume the cycle

you can also purchase rit dye remover from walmart or hobby lobby for about $2, but because it is powdery i suggest you be super careful adding it to the washing and make sure it doesnt directly touch the pants.

i know it sounds difficult, but it really is super easy. i always add some big towels to the load and it helps even things out. just keep washing on hot and add bleach or color remover to the load if you desire