Changing text box colors
 

Hi again,

I'm using the popular "Welcome Headers" plugin on my board. I know you don't offer support with third-party plugins but my question is where can I write down new CSS styles to affect the boxes contain the text messages.

By default the used CSS is the same the forum uses but I want to add some vibrant colors to make it stand out. For example, notice the Sitepoint forum index is all blue but the box that contains the sponsor ads is orange. I want to the same thing.

Thanks.