Are you willing to commit to a Kohler toilet that comes in dune, or is this the only place you will be doing the color?

I have thought about dune, sandbar, ice gray, and innocent blush at various times but the sticking point for me was do I match the toilet or feature the tub as a stand-alone color. Particularly if it is a stand-alone, I would probably do another permanent feature in the "dune" color such as a liner tile or something.

The toilet is in another room and the shower room is separate from the vanities as well. I had no idea they sold tile in this color. that's something i should look into. thanks.

threeapples--You are definitely getting hit with alot of decisions all at the same time! The dune is pretty, but colors tend to go out of style. Are you ready to commit to that color tub for the next 5,10,15,20+ years? Let me ask you this...If you were buying a house instead of building one, would you be ok with a turquoise, rose, or yellow tub or would it be on list of things to replace? Would you buy a floor model tub in A-1 100% perfect condition from a plumbing showroom display in turquoise, rose or yellow today for this house? (I actually had that opportunity when I was making my selections--you'd be suprised what you can find in showrooms in small towns!) If your answer to either of these questions is no, then I say don't go with the dune--just stay with white. The white tiles + the white tub should give the bath a clean, simple, yet elegant feel. Or you could always use your tiles for that splash of color in the bath & go with something other than white.

Just a thought--have you considered using "large subway tiles" or rectangular tiles set in a brick pattern in the kids' baths--bigger tiles means less grout for you to scrub. Just a thought...

Although I also think the dune looks nice, I agree that colors can go out of style quickly. I'd stick with basic white and use something else to lend color--paint, towels, artwork, etc.--that you can easily change.

Someone put in a blue sink and blue tub in my current master bath and I just HATE IT. If it were white, I would have so many more options for updating tile, etc., without renovating the whole room.

Just my $.02.

Mydreamhome, yes, this is a bit of a whirlwind. If I didn't have two small kids and graduate school to finish, these decisions might be a little easier. Anyway...
I've emailed the builder to see if it's too late to switch to white. I thought about it and agree with everyone's points. If he can't switch it, I'll make it work. thanks for the advice!