such as "copy/Paste/Print/Save and other most used ones?
Individual menu items have no settings for color, font or background.
If you’re trying to make items easier to find, there’s a better way to do it. Go to tools / customize and you can reorder menus and toolbars and put faves where you want, or you can create new custom menus and toolbars of your most-used commands. You can also move toolbars around (I have mine on the two sides, vertically), or undock them altogether. With Lo 5.2 you can place the commands on your context menu.