Search Icon Color

Hi.. The client (site link in private content) wants a Search Icon on the right of the main menù but the icon does not appear, if I click after the last menù item the search box appear but not the icon. I’ve try the following code, it makes the icon visible but the search box does not come out:

.header_color .main_menu ul:first-child > #menu-item-search > a svg:first-child {
    stroke: #ffffff;
    fill: #ffffff;
    color: #ffffff;
    z-index: 10;
}

This other code has no effect:

#top #wrap_all .header_color.av_header_transparency .avia-svg-icon svg:first-child {
  fill: #fff;
}

Could You please help?
Thank You Very much
Note: the Search works regularly and on mobile the icon is correctly displayed

• This topic was modified 1 hour, 34 minutes ago by newmediologo. Reason: Icon in visible and works on mobile