Color Mixing Guide is an iPhone application designed to assist users in determining the percentage of color mixing, particularly useful for painting plastic models. The app provides a picture-taking feature and focuses on five essential colors: cyan, magenta, yellow, black, and white. It serves as a helpful tool for hobbyists and artists seeking precise color ratios for their projects.

To utilize the app, users simply need to follow these steps: take a picture, touch any point on the image, view the displayed color identified as the "Target Color," and finally, see the required paints and their respective ratios to achieve the desired color blend. Color Mixing Guide simplifies the process of color mixing, making it a handy companion for model painters.