Hello,
A 3rd party module should be providing is own CSS to allow users to stylize the module. If you provide a link to the page this occurs on I can provide you an override to add to the custom.css to change the color. I would also double check this isn't already a setting of the module itself and even try using Firebug to easily identify the coding yourself.
http://www.youtube.com/watch?v=4kmZ9uQcA_cRegards,
