I love your cozy bedroom and you have made great use of the space. However I think an accent wall (especially in a dark color) will break up the room and make it feel even smaller. If you would like to try a neutral that's grown up and more neutral look at Benjamin Moore AF-540 Constellation or Benjamin Moore Mountain Mist 868. You can add color in your bedding and accessories - for example a couple of pillows or blanket.

Ice blue sounds lovely, especially for you bedroom.

The only time I like an accent wall in a traditional space is behind the bed. That doesn’t apply to your bedroom and I agree with KDC…one dark wall will make your room look smaller. Do an iced. blue all over. Suggest B.M. Iced Cube Silver because I just used it on client’s open concept first floor and it is a winner.

thank you those r exactly the colors i am leaning toward