I don't think this add on exists. It existed for Vbulletin. I was looking for someone to develop it for me. The add on would allow users (per usergroup basis) to use their own font markup- font color, font type and size, all standard bbcode in the editor for fonts in posts, threads etc. They would choose the feature in their settings to enable it and it's available on a per usergroup basis via the ACP. Please let me know if interested and capable- thanks.