My youngest son and daughter share a room and recently "graduated" from cribs to twin beds. Need advice as to what rug (and what size) would be ideal for this bedroom with the current color scheme? Note that there is an odd wall angle on the lower right corner of this photo. I'm also debating to change the accent wall to Benjamin Moore Bunker Hill Green (bedding would stay the same but bunting banner on wall would be swapped) , so ideally a rug that could work with both color palettes would be ideal. Many thanks!

photo from another angle: