I think what you are referring to is the "carbon" theme for MC360, if I'm not mistaken. All you have to do is the following:
System (Blade) -> Appearance (Option 1 at the top) -> Theme (Option 2 from the top) -> "Carbon"
This is a theme is included in MC360, as with "Glass" theme.
If this is not what you are looking for, then please let me know so that I can aid you in what you are seeking to do.