Hi Bob, I am tiling my kitchen wall and want then grout to be a green that matches my tile. Although the color on the box of Polyblend non-sanded tile grout looks the same as the tile, when it dries, it is much lighter and a different shade. I tried a small test by mixing two colored grouts by the same manufacturer, but the color still does not match. Is there some kind of pigment that I can add to either colored or white non-sanded grout that will not harm the chemical reaction necessary of the grout to work properrly? I would appreciate any suggestions that you can give me. Thank you. Judy Engle