Hello all!!
my 2 cents,,
take some Ritt dye of your color choice. powder only.
put it in a plastic cup. a little go's a long way. wet it with alcohol until you have a slurry. add it slowly to the epoxy till you see the color you want.
go easy on the alcohol it is a solvent for epoxy.
I have found that it slows the epoxy set time down a little.
after your epoxy is mixed just add the color with a small instrament.
go slow the colors are strong.