>>4863880dude google is a thing
It depends on what colour you would like to turn into. But if you would like to attain Orangish Pink like a Flamingo, try eating the shell of the shrimp, not the shrimp in itself and of course Arctic Krill also helps. The shell of these two marine animals contains Astaxanthin, a coloured pigment, which will help you change color.
But please remember, it is easy for an animal with white coloured meat by design/nature to turn pink quickly, but considering you are human, you have a red coloured meat/flesh, the quantum of Krill or Shrimp shell that you need to eat would basically kill you by the time you actually turn pink.
The secondly possibility is that, considering, you have red flesh so to say, you probably will not attain the pink or orangish pink that flamingos attain, but likely to end up with mixed color (even if you survive eating all that krill and shrimp shell) that you actually do not want.
so basically so much it would kill you
