I almost always let the bedding drive the wall color in a bedroom so maybe chooose that first and then the decision for the wall color will be easier.I find blues are difficult to work with and so much depends on your light , wood color if any so my suggestion stands get the bedding and then decide.

I wanted a light blue bedroom and had the issue with it looking like a baby's bedroom after seeing what it looked like on part of one wall. I ended up doing sponge painting over white with the blue I was going to use, added a slightly different color but but same shade of blue. It looks like wall paper and I still like it. And I hated sponge painted walls. I would use a gray with a hint of blue, thats probably the only way of getting away with a light color of blue without it looking like a baby's room.

Gray is definitely a hard colour to work with. It's either too brown, too green, too mauve or too blue. I tried 6 different shades of gray before I finally settled on Coventry Gray and Stonington gray by BM. After the first coat of Coventry GrayI was unsure. It looked too blue?? After the second coat I was falling in love LOL!! I used Coventry gray for accent walls and Stonington Gray on walls with less light. You can barely tell that I used two different shades which is what I wanted. The colours are amazing! Everyone that walks in can't believe the transition. I would suggest you buy a sample jar (I used Behr paint) and paint a good size on a few of the walls to see how the lighting hits it. I'll send you a photo, if I can figure it out HAHA!! I looked at your colour choices and they all look beautiful on the swatches, but beware of how it will look on the wall.

this is Coventry Gray. But of course, the computer and lighting will change the colour but I love it!

The wall with the painting is coventry gray as is the wall with the two white mirrors and the wall that has the sofa table is stonington gray. There's not much difference but the stonington gray is just a bit lighter. Hope this helps!