Whoa !!! Very few tiles can go warm AND/ OR cool, unless we're talking plain old white! You need no more than two tiles in any bath. A large one for the shower, a mosaic version size of that for the shower floor, and something for the bath floor, and you CAN REPEAT one of those. One of the single biggest mistakes that leads to design agony is trying to do too much. "Spark" can come from may things, a bath is more than tile. So.........warm or cool first. And of the four mentioned above, did you see them in person, or are you attempting this online, which I would NOT recommend.

Second, what is your pan for a vanity? Light ? Dark?

Last post a phot0 of the existing bathroom, and summarize your plan. You'll get more help

Jan, I promise the photos I'd post right now would be of no help. It's all studs and insulation and wiring. I can tell you there will be a walk in shower that'll be 5x5 on the far end of the bathroom, on another wall, not touching the shower, will be a drop in bathtub. Across from that will be the commode, and the white double sink vanity will be on the opposite end of the room from the shower. I'm only putting tile in the shower, the bathroom floor and a little around the bathtub. Maybe 18 inches up. Does that help any?

Well your requirements are small. I would strongly suggest you look at Marble Systems. Very well priced and lovely, I just used the one below, in multiple sizes, all the SAME.. Mosaic one inch on the shower floor, and an 18 inch high tub surround, !2 inch on the shower walls. I'd share a pic, but haven' t yet taken one: ) White vanities too. Sherwin Williams " First Star" on the walls. My client has a hardwood floor.....if not, I'd have repeated the 12 inch on the bath floor. It's simple.....and it is beautiful , calm and feels like a spa. Cheerful and light filled as well, and it has no window.!!!.

http://www.marblesystems.com/marble/white/glacier-honed/

I'll see if there is a source in my area and take a look. Thanks for all the suggestions. I'd love to see a picture when you get around to taking one.