You can pigment print on to acrylic but on pure acrylic it is a touch and go at best. If you want it one color I would suggest buying it in that color and let someone else deal with the headache of color set up. If needing multi-color can you do inserts? That way you could bond it with Methyl based super glue or resin and it would do the job. Or if it is a small sheet you could always make the color by doing a resin pour. Just some ideas to think on.

Michael