When you see a paint sample strip that has 4-6 colors on it that seem to be gradations of "shade," is there actually any rule of thumb for the percentage difference between the "shades?" I'm getting a lot of customers lately who pick a primary color for a room and then ask me to paint an...

Has anyone tried the new Sherwin Williams Visualizer, you can add photos of a room/exterior and change the colors pretty easily. Visualizer