Changing the color of drop down text only

Site URL: https://www.crliquidators.com

Does anyone know if you can change the color of the text in the drop down menus in the header without changing the whole color scheme in version 7.1? I just want to make the drop down stand out from the rest of the header, say yellow text on drop menu while retaining the white text in the header.

Add to Home > Design > Custom CSS

/* dropdown items color */
.header-nav-folder-item a {
    color: green !important;
}