Page menu bar color

Hello
Is there a way to have the page menu bar one color and have the buttons on it another color? I am currently using Atahualpa 3.4.6.
I want to have white page buttons on a brown bar
I tried adding this code into the css inserts

div#menu1 {

background: #42260c !important;
}

But nothing happened. Still learning html and css so any help would be great
cheers
Segan