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The RGB
This nice GTK3 style provides a red and black theme for your GNOME desktop environment...
The RGB theme trainer
Lear the basics of theme creation with this GTK3 style for the GNOME desktop environment...
SGI RGB Image File Plug-In
SGI plug-in provides SGI image file load & save modules for The GIMP....
PublishCMYK
PublishCMYK is a tool to convert RGB Pictures to CMYK....
Graphics::ColorNames
Defines RGB values for common color names...
Graphics::RGBManipulate
HSV adjustment tool for RGB colours...