Doesn't this picture fit your idea of what Hemingway's bedroom would look like? Just the right amount of detail and contrast, but not too cluttered - just like his writing. Here's a great series called Literary Style: 15 Writers' Bedrooms.
A bedroom is really a personal space so this is a very interesting glimpse into the life of artists. I thought about photographing mine for you, but at the moment there's one lazy dog and two cartoon-watching kiddos occupying the space. What I will tell you is that I think my bedroom is very serene. The walls are the color of rain, or what I perceive is the color of rain. I have a chair by the window and it's my favorite place to read.
If you are an artist or writer, tell me: what's your favorite thing about your bedroom space?