Set or get the background color NavBarControl of DevExpress?

Question

Set or get the background color NavBar Control of DevExpress ? I've set (or get) the background color NavBar Control but it isn't ? you see code below.

set background color NavBar Control:

Code:

navBarControl1.Appearance.GroupBackground.BackColor = Color.White;
navBarControl1.BackColor = Color.White;

or get background color NavBar Control:

Code:

System.Drawing.Color c1 = navBarControl1.Appearance.GroupBackground.BackColor;
System.Drawing.Color c2 = navBarControl1.BackColor;
webBrowser1.Document.BackColor = c1;
webBrowser2.Document.BackColor = c2;

do you know set or get the background color NavBar ?