How to change color of the bottom menu bar?

The default color of menu bar is white and black. How can I change the color of bottom menu bar?

1. Click option "Design Settings" left;
2. Choose "Tool Bar"-->"Tool Bar", "Bar Color" and "Icon Color";
3. Set "Show" for "Tool Bar" option, click "Bar Color" to select a color for menu bar, click "Icon Color" to select a color for text on menu bar;
4. Click button "Apply Change" on top menu.