aklvdb, we painted our bedroom Valspar Iron Frost which is even darker than Night Train (as it looks on my monitor). When it was first done, it seemed very dark, but the room is very sunny/bright, and it's just such a beautiful color that we love it --- on all 4 walls. (That said, of course, since you already have curtains on order, wait before making a decision!)

To answer your direct questions: Put the darker color behind the bed headboard and then decide if you want one accent wall (usually a lot of contrast) or if you want to have two walls each color. The Santorini Blue is not baby blue, but I would put a color swatch in your room to see how it looks in different light if you decide to go in that direction. Glass Slipper is more ice blue than baby blue. I LOVE the Santorini blue, but thought it was too dark to have on all four walls. Your bedding is very neutral and very pretty. When I look at it I think "irredesence" or opal. Everyone does this differently, but I tend to decide what I want a room to FEEL like and then go from there. For our bedroom I thought "sleeping in the clouds". Hence, I have blues, whites, creams and beige. For our bathroom I wanted "beach spa". I also suggest you look through the bathroom pictures on the bathroom forum. I found several inspirational rooms that worked with the tile and cabinets we had. I think one of the reasons you are struggling is that you are working with "what matches" instead of what look do I love. Love something, make it work in your room. Having said that, I think your tile would work well with blues, tans or many of the greiges. Whatever you decide, you are likely going to need an accent color since your bedding has wonderful texture, but only one color. Again, look at the bathroom forums pictures and here in gallary under "bathrooms". Which rooms catch your breadth or you say to yourself, "I want that feeling". Good luck!

Nothing wrong with mixing up colors. The colors should coordinate a bit so they flow from one room to another. My master suite is three rooms in an "L" shape, the sitting room is in the middle. All three rooms are open to one another with doorless archways, so they do flow visually. The center room, the sitting room, has deep red/burgundy walls and a cream/ivory trim color. Off one side of the sitting room is the bathroom. The the trim and cabinets are the same cream/ivory as the sitting room, but the wall are somewhat beige. Off to the other side of the sitting room is our bedroom. In there the walls are sort of a cream/ivory, and the trim/cabinets/wainscot is a deep muted historical green. The cream/ivory sort of ties the three rooms together and the other colors sort of bounce off that. For bathrooms which can be dominated by hard surfaces (fixtures/tile/stained wood) where the color of those items can be difficult or expensive to change, I usually recommend that those hard surfaces be a neutral or somewhat muted color. Then the wall color, or soft accent items like towels and throw rugs, curtains, etc, which are easy to change, be the stronger and sometimes more vibrant accent color. The hard surface colors in our bathroom are sort of neutral (cream cabinets and trim, beige walls, natural teak for the countertops and tub deck, tile is cream and charcoal), we change the color of the towels/rugs whenever we feel like it. Sometimes to a strong color; deep green, cranberry red, etc, sometimes to a soft neutral like beige, off-white, etc. And there is nothing wrong experimenting with colors either, especially paint. At roughly 10 cents a square foot coverage for basic formulations, paint color can be inexpensive and fairly easy to change.

Do you have another bathtub in the house...for bathing kids? Unless you or your spouse enjoy baths...maybe eliminate the tub in the MBA? I am glad I have a linen closet in my MBA. I agree with eliminating the reach-in closets and adding windows. Also think about how you dress; a walk-in closet can hold all the things people used to store in dressers. (You really don't *need* a window in a closet, although Mark gave it one.) I agree with him about losing the (dated) double doors -- and creating an entry, rather than plopping right into the living room. If you'll eat at the kitchen island a lot, consider seating that's not all-in-a-row. It makes conversation difficult.