What will the furnishings and rug, if any, look like? These should be considered, along with any adjacent areas within view.

Adjacent area in view is a wood deck, beyond which is green grass and pine trees. The furniture will be a walnut desk and black desk chair.

Share the actual room not a mock up

We need to see your furniture for any suggestions, and the actual room not a mockup.

White is the best color to brighten a room. With the wood ceiling, I'd use a warm white like Cloud White or Timid White.