Change Select List Option background colour on hover

Answer 1

Implementing an inset box shadow CSS works on Firefox:

select option:checked,
select option:hover {
    box-shadow: 0 0 10px 100px #000 inset;
}

Checked option item works in Chrome:

select:focus > option:checked { 
    background: #000 !important;
}

There is test on https://codepen.io/egle/pen/zzOKLe

For me this is working on Google Chrome Version 76.0.3809.100 (Official Build) (64-bit)

Newest article I have found about this issue by Chris Coyier (Oct 28, 2019) https://css-tricks.com/the-current-state-of-styling-selects-in-2019/