When we were attempting to repaint both the interior and exterior of our house, we almost went crazy. We brought home swatches, we painted test patches, we repainted test patches, we painted entire walls and then decided the color didn't look good, you get the idea. This color matching app by DuPont for the iPhone might have helped. The DuPont iPhone app (is free) lets users browse their entire collection of surface finishes and colors. Watch the video of the app in action after the break.