If you find the right person to talk to, you may get the proper information for your proper application. It's always a good practice to get three or more opinions before making your final choice.
If you are choosing to paint one wall or an entire house, the Sherwin-Williams ColorSnap Visualizer can give you a clear picture of color choices that helps you decide. We use quality paints, and recommend viewing this color chart program. Click on COLORSNAP Image below.