I am using Verdant theme and wanted to change the background color of the side bars. However it seems it does not change the background color of the actual sidebar but the background color of the widgets.
I worked around it by adding following code in Addtional CSS :
/* make right sidebar light grey */
#container.two-columns-right #secondary {
background-color: #fbfbfb;
}
That’s how the color control options are designed to work in Kahuna – the sidebars’ background color applies to the individual widgets to create a block-like visual appearance.