Hi there,
The coding you have placed in your page works fine, a black bar with a green border. Can't see why you are concerned about it as it is only at the browser level that the real effects are seen. If there is a difficulty viewing the scroll bar in the 'live data' view in UD, it is of little consequence. As long as your visitors are using IE 4 or greater (and maybe NS6, not too sure about that) they too will be able to complement you on you colour scheme. Do be too concerned.
hope this helps.
M "There are 3 kinds of people; those that can count and those that can't"