Keeping your your bright and fresh with a pop of blue at the entry.

Since your room gets plenty of sunlight you could play with a few different shades but still keep to light colors to make your room feel bright. I have given you a light blue gray shade as well as a more true light grey-beige option to see hwat you prefer. I would definitely keep your trim white, but if it needs to be repainted I have also give you white that I think is very true and bright that I always use.

My rule is to use Flat paint on the ceiling, eggshell paint on walls, and semi gloss on trim/base. Use an eggshell finish paint which has a very light touch of shine (similar texture to an eggshell as implied by its name). This finish is very often used for walls and is more durable and easier to clean than matte finish