XF 1.3 How to maintain font color/face consistency?


I have several users that love to use reds, blues and yellows and 3 different font sizes in posts.

I would like to standardize the font color and limit the font size in all posts. I hate having 3 different colors and sizes in a thread.

Is it possible to filter font colors on output to only allow the body color?

What is the best resource to customize the editor so I can control how my users style text?