alch_default_page_icon

Filter alch_default_page_icon should be used to change the default AO options pages icon. The default value is the AO logo. The passed value should be compatible with the $icon_url parameter of the add_menu_page function.

Example

function change_default_page_icon() {
    return 'dashicons-chart-pie';
}

add_filter( 'alch_default_page_icon', 'change_default_page_icon' );

To modify the page icon on a per-page basis use the alch_{ $optionsPageID }_icon hook.