A while back, someone (I think it was Louisa) asked if there was a way to change all our homepage fonts. There is, and it's really quick! And it works on group pages too.

<style>
* { font-family: Font Name Here !important; font-size: Font Size Here !important; color: Color Here !important; }
</style>

An example:
<style>
* { font-family: Arial !important; font-size: 13px !important; color: #ffffff !important; }
</style>

That's all. You can change other font properties too (besides font-family and font-size) but keep in mind that this will affect ALL the text on your homepage. It won't alter the color of your links, though.