What color are you trying to change? Once you update CSS by hand it can make the design editor stop working. It is possible you will have to change the color manually in the CSS at this point.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.