HTML is not really as hard as it sounds and is the perfect solution to a boring page. Unfortunately, powerpets has limited the use of HTML codes, but here are a few that are allowed.
The basic code for font colour is:
<font colour="colour">The text you want coloured.</font>
You can use most colour names (such as blue, pink, yellow, red, green, etc.) or if you want something more specific, you can use hex codes. Hex codes are useful because computers arent smart enough to recognize lavender as a colour, as nice as it may be.
Here is a great hex code chart. (click on it to enlarge). When you use a hex code, make sure you put a # infront of the number - so the HTML code for it should look like this:
<font colour=#hexcode>The text you want coloured.</font>