I recently designed my own home office and picked out the color scheme for it myself. I read so many articles about what color to use for the walls, and every other source of ideas.
I decided that I would paint the walls the color that I absolutely move more than any color in the world. There is no article out there that encourages you to paint your walls a shade of blue that borders on purple! Yet, that is the color I chose.
I feel so peaceful when I am in my little office and every time I look at the walls, I smile. That is the guideline that everyone asking what color to paint their walls should adhere to. Paint what you love!