Your bedding drives the color choices for all the walls in a bedroom so post that here and you will get answers.

All depends on what the colour of your other 3 walls are now, and what colours you have for your bedding but here are some suggestions for Farmhouse style paint colours.

Accent walls are kinda "been there done that" - so, I'd paint all the walls the same, and accent with art, textiles, etc.

To get valuable suggestions you need to post a picture of the room and furniture.