Change Background Color of Custom Menu 2

Hi, I would like to change the background color of Custom Menu 2. The stylesheet.css has “url(‘../images/main_nav_bgr_dark.png’)” which makes it impossible to change background color:

.custom_menu2 #menu {
background: #393b3c url(‘../images/main_nav_bgr_dark.png’) top left repeat-x;

I have to delete the url code, then change “background: #393b3c” to another color. Could you please tell whether this is the correct way to do it? I mean, if I delete “url(‘../images/main_nav_bgr_dark.png’)”, will there be any negative consequences?

Thank you for your help!