Sherwin-Williams (yes, the paint place) recently released a browser add-in called Chip It! The add-in allows a user to take a picture that's online and find up to 10 of the colors in the picture.
Presumably, it's meant to be a tool to allow users to find a paint color to match a beloved picture or swatch of fabric. But me being me, I've been using it to find the colors on my favorite album covers!
I don't actually have any current plans to create room themes around any of these albums, though the ease of using this tool may make that a future project!