I don’t have an RGB-LED to test with but I’ll check the doc’s. You might want to connect a simple LED to one of the GPIO pin and have OH control it. Just to get the connection to Esp and OH configured. After you have one thing working the rest will be easy.
Here is some info on RGB-LED from the EspEasy forum that might help.
http://www.letscontrolit.com/forum/search.php?keywords=RGB-LED&sid=a924df6134bd75f36ed4838610e4fe6d