Go to :
www.sherwin-williams.com/visualizer
You will be able to upload a photo or choose one from the site. Interior includes different views of kitchens, baths, living rooms and bedrooms. The exterior includes Victorian, Colonial, Ranch and French Country.
You can explore the color of the day or choose your own shades. Try them out to see what they will look like before paying for gallons of custom colors only to find out you don't like the look of them together.