Real Color Mixer is a free and easy-to-use application that lets you create and mix your own paint colors. You can choose from a variety of paint colors, including the standard ones like red, green, and blue. This app is designed to simulate mixing real paints in different proportions, making it possible to preview the newly created colors without actually mixing the physical paints.

To use this app, you first need to install it. After that, you will be able to use it by pressing the 'mixer' panel. You can change the mixing ratio by pressing the plus (+) or minus (-) buttons.