A Sketch plugin that generates a Swift Extension or UIColor Objective-C category from your Sketch documents. A menu option automatically create a blank colour swatch sheet in Sketch that you can then add custom colours and names to. With a second menu option the plugin will ask you for a category prefix and generate the .m and .h files containing class methods for each of your custom colours with the names you provided. A very simple but handy plugin, especially if you already use Sketch to design your apps.