Here is a little side project I did, that allows to quickly get an idea of the color distribution of an image in the Hue / Luminosity color wheel.
This can be used by designer to check if an image follows some specific color scheme, like using only complementary colors.
I wrote the code in C, and compiled it in JavaScript with emscripten.
I am planning to write a following post to show how I intend to use this tool for a new video game project I am working on.