Behr, Benjamin Moore and Sherwin Williams provide interior house paint color charts online. All three websites place paint colors into categories and provide a way to explore how different colors look in different rooms of the house.
Behr categorizes paint by color family, decorator style, popularity and paint type. After choosing a paint color, the user can preview it in a room image. Benjamin Moore has a Personal Color Viewer that allows the user to upload her own photo and preview with as many as five defined surfaces in the photo. Sherwin Williams offers an app for Apple devices that allows the user to test paint colors on their own walls.