Icon color change

Hello – I am trying to change the color of the icon (only) under the home page image rotation. I have identified (I think) the css code in firebug however when I add it to the stye sheet it doesn’t make the change.

Below is the code I used:

.main_color .heading-color, .main_color h1, .main_color h2, .main_color h3, .main_color h4, .main_color h5, .main_color h6, .main_color .sidebar .current_page_item > a, .main_color .sidebar .current-menu-item > a, .main_color .pagination .current, .main_color .pagination a:hover, .main_color strong.avia-testimonial-name, .main_color .heading, .main_color .toggle_content strong, .main_color .toggle_content strong a, .main_color .tab_content strong, .main_color .tab_content strong a, .main_color .asc_count, .main_color .avia-testimonial-content strong, .main_color div .news-headline {

color: #336699;

}