Online Colorscheme Configurator for i3, i3status, dmenu
This is a crude webapp for generating configuration files for theming i3, i3status, and dmenu. Change any of the inputs and you'll be greeted with a UI tool to select a color. Copy and paste colors between fields to make them consistent.
As you make changes the mocked-up UI and the configuration output will change. Once you're satisfied you can copy the configuration into your local config files.