Add an !important after the color for 'control_color' and 'control_hover_color'. So if you used #000000, you would put #000000!important
If you want to make them completely different than the others, you would go to additional.css and add
HTML Code:
#sidebar_container li a
{
color: /*Add your normal color HEX or RGB value here*/
}
#sidebar_container li a:hover
{
color: /*Add your hover color value here*/
}