Since your room gets plenty of sunlight your color options are quite broad.

For your main color, we chose to use white/off-white as it offers a fresh, clean, feel to the space. White and off-white colors are often a favorite for walls because they are light, neutral, and match most color schemes. They are known to make rooms feel more airy and spacious and allows for the artwork, pillows and other items to really make the statement.

Use a matte finish paint because it will be helpful in camouflaging those surface imperfections such as bumps and cracks as it does not reflect light. Just be careful because matte finish is more difficult to clean. You may also need to touch up scratches or marks by adding more of the same paint in the future.

Using lighter colors in your medium-sized room will make it feel more airy and bright

For your main color, we chose to use white/off-white as it offers a fresh, clean, feel to the space. This choice also allowed for the headboard wallpaper wall to be the focal point in the room and doesn't detract from its monochromatic print.

Use a matte finish paint because it will be helpful in camouflaging those surface imperfections such as bumps and cracks as it does not reflect light. Just be careful because matte finish is more difficult to clean. You may also need to touch up scratches or marks by adding more of the same paint in the future.