Inject CSS
This plugin inserts the CSS of the selected Moodle theme into the TinyMCE editor to ensure that the text's appearance in the editor matches how it will actually display.

Features
The entirety of the themes CSS is inserted into the TinyMCE editor.

Usage
Make sure that the plugin is enabled under Site administration > Plugins > Text editors > TinyMCE editor > Inject CSS. The CSS of the theme should be inserted automatically into the TinyMCE editor. No further configuration is required.