Remove stain from synthetic leather
The dye has probably migrated a bit into your ball`s surface, so whatever (solvent) you try to get it out with again, it might take a while.

Remember the classic school (chromatography) experiment: You draw a line with a felt pen on a piece of paper, 2 cm from the edge, and stick the paper into a glass filled only 1cm high with acetone.

You can try to transport the dye so far into the ball you dont see it any more, or try to "fill the glass up to 3cm with acetone". ;)

And remember: Its hard to tell how resistant your ball and its original painting is to acetone or hair bleach or soda.