// Android
<meta name="theme-color" content="ping">
<script>
document.getElementsByName("theme-color")[0].setAttribute("content", "red");
</script>
// iOS - nefunguje min. v iOS 11
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">