menu color problems

Hi.  I'm working on the layout and custom code for my new website. Great job with Catch box, I'm enjoying working with it. I been through the support questions about changing the menu background color, menu font color and rollover background/font colors. I can't seem to get any of the code to work. It's like it's being blocked. I was playing with code in the custom css box and was able to change menu border width and color (though I don't need that to change). I was able to use other coding to change the header image, etc. Can you please help me. The website I'm working with is www.realchangeglobal.org (please note, it's just a trial and error site at the moment, so I can learn how to work it first.) So to recap, how do you change the menu colors, background and font.. so that it overrides the gradient style. Thank you so very much for what you do!! Jana