Open up your website in firefox or chrome and turn on firebug in firefox, or click view>developer tools (my preference) in chrome and then use the inspect button (you'll find it) and highlight the menu items. Then look down at the CSS which will be on the right side, html on the left, at the bottom and change the colors there. Then copy that code and change the css in the server files. You can find the location of the files using developer tools also. Just be careful when adjusting CSS. you'll be adjusting it on one of style1, 2, or 3, so you'll have to select that style on the frontend to see the changes, once you have made them on the backend files.