The ColorRite Sanded Silicon ("ColorSIL") Silver Shadow and the Smoke grey had good color matching with the grout and the sanded texture made it blend in well with the grout. But I have to say the "MIST ACCESSORY PACK with 4OZ.. SPRAY BOTTLE" was what really made the magic happen. I am usually a skeptic of special grouting tool but I decided to give the accessory pack a try based on Aubrey's (of ColorRite Inc.) recommendation.
Ah now, this is the way to go. LOVE printing on fabric. I used some pieces of sheet cotton and Pebeo Setacolors and Jacquard Lumiere. I occasionally mixed the two types of paints together because the Lumiere gives a lovely sheen. I also added Pebeo's Setacolor medium which meant my paints went further. First layer I used textures. My favourite were a fun foam stamp, bubblewrap (awesome), wallpaper and a grouting tool to make lines: