Wiki

I have a revision wiki for chemistry with 8 topics. Each is given its own page as follows"
[Topic 1]
[Topic 2]
[Topic 3]
etc, but with slightly more informative titles!

As the unit is in two parts I want to colour code them by topic - first four in red and second four in green for instance. If I change the colour, either using the wysiwyg editor or through html the "?" link disappears.
What am I to do? I am a Moodle novice, but there is no-one at school I can ask. As they say, in the Kingdom of the Blind ...

Having said that, I have no admin privileges - I had to fight to get "Editing Teacher" permissions!

Thanks in advance

Mister G