I’m converting this room to a baby’s nursery and I can’t find a solution for these windows. They are facing west so the sun is strong there in the afternoon. We definitely want to have something to black out the light. As you can see, the 2 small windows don’t have any cover. As a decorative feature, I wanted to put a valance (made with fabric and styrofoam) over the big window and curtains over the small windows but it would not look right as the small windows are too close.
Also the space on the right of the small window is only 6.5inches so not much room there.
This may be irrelevant but I’m planning to have an accent wall (left wall, not pictured) in mint green (Valspar Mint Hint 6004-9A). And I’d love to also get ideas on what light colors go well with it. The room is all white even though in the picture it looks grey.

Thanks for your help!