Sherwin-Williams has an app that you can download!
Use ColorSnap® Visualizer for Web, Mobile, or iPad to capture colors from your surrounding and match them to Sherwin-Williams paint colors. Explore over 1,500 colors to get inspiration from a photo. Virtually paint your rooms with ColorSnap® Visualizer for Web and iPad.
The app allows you to browse their color selection and save your favorites! To make it even better, you can take a picture of whatever you’re painting (Cabinets, Walls, Furniture, etc.) and drag the color you want to see up there to picture it before actually dedicating to the color!