We painted our new construction basement walls Misty Harbor by Valspar. I am not a pastel person at all-- but it looks very crisp and modern with the white trim. We have brown accents and it all looks very fresh! Good luck.

Try posting over at the Home Decorating site. Lots of people over there really know their paint colors. If you were using SW, I'd recommend Misty, Samovar Silver, Silver Mist or Krypton, but I don't know BM paint colors.

Devine Paint has some "devine" sophisticated blues. They are not "pastel" at all. Swell is a beautiful one I have used in the past.
As another suggestion, a blue we just used in our daughter's rooms is BM Crystal Springs. It's a nice light blue, goes well with black and white accents. And looks very different on the wall than it does on the chip.

I used a great grayish-blue in one of our bedrooms last year: Behr Pensive Sky (710E-2)

It's not pastel at all.

I think the color 'Horizons' by Glidden is beautiful. My aunt had it in her Phoenix house. It was a very peaceful color.

The trick is to ensure that there is enough gray in the mix. Otherwise, it will go "pastel" on you and look nursery.

You might begin in the grays, not the blues, and pay attention to the names which tend to indicate undertones.

Hi,
I was looking for the same look. We tried Gray Wisp from BM. The swatch was very different when you painted the entire room the color. It looked powder blue with a touch of grey. We then painted the dining room/living room Farrow and Ball Blue Gray. The paint is grey with a green hue (not blue). We like it a lot.