.ui-button .ui-icon {
    background-image: url("overrideExtra/ui-icons_1c94c4_256x240.png");
}

a.ui-button.ui-state-active{
    color: #c77405;
}
a.ui-button.ui-state-active .ui-icon{
    background-image: url("../themes/ui-lightness/images/ui-icons_ef8c08_256x240.png");
}