Please see: https://github.com/kevinSuttle/html-meta-tags, thanks for the idea @dandv!
Copied from http://code.lancepollard.com/complete-list-of-html-meta-tags/
Native HTML controls are a challenge to style. You can style any element in the web platform that uses Shadow DOM with a pseudo element ::pseudo-element
or the /deep/
path selector.
video::webkit-media-controls-timeline {
background-color: lime;
}
video /deep/ input[type=range] {