I want to change this bar's color and width, if you tell me how to get to the place to change the color of it 'll know how to change it, so really where do you go to change this bar's color?
Bar example:
Link to the forum? So I can tell you what to change?
ACP >> Templates & Styles >> Themes >> Your Theme >> global.css >> .navigation
Edit that CSS class, if you want to edit the html itself go to.
ACP >> Templates & Styles >> Templates >>Your Theme >> Navigation
You need to modify its class/ID in global.css
Its mainly called 'navigation', so search for .navigation in your global.css.
Or provide your forum URL so that I can have a look at it.