Hi Terry,
I unfortunately cannot find the CSS issue you describe 🙁 I looked around on your Month View page for quite a while but could not find a color change like you describe.
Since we do not offer customization support, I will close this ticket for now. If you need to write custom CSS on your site, definitely check out a [free!] tool like Firebug if you use FireFox, or the Developer Tools for either Safari or Chrome. They have “Inspector” tools that let you zoom right over the element whose color changes, and see what CSS you’d need to write to fix that.
Best of luck with your site!
George