Set or get the background color NavBar Control of DevExpress ?

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 ?

Try their website. There are lots of helpful people over there.