Why not go crazy with the marble? It's such a gorgeous look and you can get it cut into tiles in different sizes/shapes for a wonderfully cohesive plan.

i wanted to bring more color into it. My slabs have a lot of gold and also gray in them. The gold almost has a brownish terra cotta color. I have been thinking of integrating some mediaterran tiles in the shower and backsplash. Thank you for your pictures.

How about this iridescent glass brick for your backsplash, you might like it:
http://tiledaily.com/2011/11/19/small-brick-iridescent-glass-mosaic-grey/
http://tiledaily.com/2011/12/09/quartz-vein-porcelain-tile-dark-series/

Kakiebell, if you are looking to do a combination of finishes, I highly recommend getting an interior decorator or designer to put together some samples for you. It would be a small investment compared to the cost of your bathroom and it will give you actual products available to you which will fit your budget.

While I think the tiles benjijk linked to are beautiful I would not recommend combining them with the marble. Those tiles alone would be an accent in a bathroom. You already have your accent with the pattern of the marble. Too many accent pieces together are distracting and won't give the effect you're looking for.

I have seen your marble combined with medium/dark wood cabinetry and that also looks nice as it grounds the room. You could even consider a cantilevered cabinet/counter combination with lighting underneath it to highlight the floor. There are lots of possibilities, but if you sit down with a designer for an hour or two with your plan, you'll get excellent information and advice.

A warm wood-look plank porcelain can look beautiful with this too, depending upon the look that you want.

I am using Walnut cabinets in the room which warms up the room and some wood beams around the tub and shower. I am working with a decorator but I like to do some research on my own also. Thank you all for your comments.

Currently working on a similar project and I have chosen to incorporate Dark Emperador deco pieces in the shower, and around the vanities. It only takes a little to play off the walnut tones. Good Luck

I used marble for the both the

tub deck and aprons, shower niche, windowsill, and floor saddle. I didn't use it on the floor, but this was one of my inspiration photos