White

I want a resin that is white without having to dye it myself. I want to be able to make many small projects quickly such as jewelry, fridge magnets or key rings.

Then you should use Polyurethane Resin which you then color with acrylic paint, pencils or perhaps chrome pens, most colors can be used.

It is fine to color the resin as well, but once you have mixed it, you have about 2 minutes before it hardens.