accordion hover problem

Hi,

I cannot change the accordion hover color. This is my accordion hover color.

.ui-state-active, .ui-widget-content .ui-state-active, .ui-widget-header .ui-state-active, a.ui-button:active, .ui-button:active, .ui-button.ui-state-active:hover {
  border: 1px solid #73d0f4 !important;    
}

I used this CSS to change color. But it didn’t work well. Please help.