We like True Value Grape Ice. It brings out the color of the iris in our wall art beautifully. (Please ignore the rest of the room -- this was before we cleaned it up and rearranged things.)

I've only seen it in pictures, but Benjamin Moore Riviera Azure looks like a pretty periwinkle.

Thank you so much, I'm going to check out both those options - I think it's such a happy color!

Farrow and Ball Pitch Blue.

BM Celestia? I think that's the name. I believe it's on the same color strip with Freesia. All the colors on that strip are nice. I have Celestia in my kids' bathroom and it's pretty and airy.