Every once in a while I like to give you an example of the tools we use in this business called Architecture. Things have come a long way since the old pencil and straight edge days. Now we perform all of our designs "virtually" using 3 dimensional computer programs. These programs allow an Architect to understand and communicate a design better.
Below is an example of a design for a client that has been completed. But we are trying to get a better feeling for a potential color scheme. In this case my client had a few color schemes in mind. So I did a series of studies using "Sketchup" - one of our 3d modeling tools. This is a great way of testing a color scheme before you get committed to it.
These studies helped my client get comfortable (excited even) with her color choices.
So don't just use those little paint chip cards to make your final selections. Get your colored pencils out and test the scheme on one of your house elevations. Or better yet have your design professional test the color scheme using a 3d modeling tool like I do.