These are all great colors by Behr. I have used Behr and Benjamin Moore paints for around 26 years they both last the same (same hardiness) they both catch the light as most paints do. The screen shots do make these colors look a bit more vibrant than real life.

This may be too much for you, but it's BM tropical dusk.

Would be helpful if you posted a pic of the bedding....

Here is Ben Moor Pigeon Gray. The darker gray on the same chip is Dior Gray which is also very striking.

Also the bathroom faces East.

Here is a link to the bedding I can't seem to attach a photo

Here is a link that might be useful: Bedding

Here's the bedding

BM Feather is a gorgeous gray/lavender and looks stunning with light wood floors.

You might try SW Rhinestone. I have it and it is light and goes slightly lavender with most light. I don't mention it to my husband. His color perception isn't as strong as mine.

Take a look at Farrow &Ball brassica

Here is a link that might be useful: F&B Brassica

BM's Slip.

I was also going to suggest Pigeon Gray. But look at the slip. We did my daughter's room in the last house in that color. It was exquisite.

Here's a couple of pictures, you know how the light can change the color. The headboard is white for reference. The middle photo is probably the best representation of the color.

Another vote for F&B Brassica.
Beautifully subtle, and not the least bit pink, which I think works better with your bedding.

Bee's room is lovely, but different from yours in that her purples look pinker than yours, so the pinky lavender is good there.