Shades of a color sounds lovely. I was in a home in San Francisco, one of those 'painted ladies' of a friend. I couldn't quite figure out how inside was all together but different until the owner told me the inside of the house was painted 33 shades of green!
Not paint related, but that wall that you said was in the place of the railing in the photo? Great place to hang a large quilt. If you already have something that you would like to showcase, consider the colors in that