I made a quick css workaround for opera and chrome by removing the background color only for these two browsers, you need to set the background to white, because on Win 7 and Opera 33 the background color still works:

@supports (-webkit-appearance:none) and (motion-path:path('M0,0')) {
    select {
    color: #000000;
    background: #FFFFFF;
    }

}

Same problem here on Win 8.1 and Win 10.

Background color is ignored by Opera on HTML <option> selected Attribute:

http://www.w3schools.com/tags/att_option_selected.asp