Coloring Grout Question
I am new to mosaic work although I have experience with stained glass. I am working on an intricate and colorful stained glass mosaic right now and would like to have many different colors of grout. Should I premix many containers of grout and do each area a different color or should I paint the grout afterwords? I read somewhere on this board that painted grout looks tacky. Is that true? Please help!!