Hi Ryan.
It is likely that you are using the wrong approach to what you are trying to do. If you are really looking to store the color and font of a certain string in the registry, you would have to store these as a string (font name, color in hex). If you're rendering these as HTML, you'd just store them as HTML.
Either way, it's not recommended that you overload the registry with such values. but rather use XML or a similar format.