PSD (Photoshop Document) & PSB (Photoshop Big) Plugin for Qt/C++ (Qt4/Qt5/Qt6)

Cyan Graphics

Example of how to use path rendering; and how to use it with CMYK (using multi-render target)

Linux GUI to facilitate conversion of an image from RGB to CMYK colorspace

Fegeya Colin, beautiful CLI color info tool. Written in C++.

Color Converter (RGB/CMYK/GRAY)

convet RGB to HSV to HEX to CMYK to HSL

A tool to visualize CMYK and convert it to RGB