Hi!
I made a mini plugin to change the browser header color, but I think this could be a great option in Theme Options. Also, if there is no plugin, it is one reason less to install a Child theme.
// change temp theme browser header
add_action( 'wp_head', 'change_browser_header_color', 99999 );
function change_browser_header_color() {
?>
<meta name="theme-color" content="#color-here" />
<?php
}
Thanks!