I understand that we can customize the background color of panel box by setting the "background" and "ramp" like Core Dark, Highlight Default, etc. How can I find out what's the Color Name or Hex color code for the equivalent background? For example, is Core Dark equivalent to #00008B/DarkBlue from the HTML color codes?
User, please tell us your jdev version!
Not sure if I understand your question, but why don't you use firebug or any other html development tool and inspect the page in the browser?