I wonder how much dye it was take to turn Jupiter pink or blue for a gender reveal party?

I’d have to think about this, but I bet that there are some non-dye chemical reactions you could use, given Jupiter’s composition, to get one or both of those colors more easily. Hmmm, more research is required. Might be able to reduce the dye (or whatever) needed from 10^12 tons to something more manageable like 10^8.