Cyan’s plugin is a color emulator that lets you convert the colors in your file from RGB to CMYK for printing or from CMYK to RGB if editing for a screen-based result.

If you can’t create the design in CMYK from the beginning, you should use software that converts RGB to CMYK — although this often results in disappointing color differences.

The open source image editing app GIMP has released version 3.1.2. GIMP 3.1.2 is the first development release for GIMP 3.2, and includes new paint modes, text options, CMYK settings for printing ...