Add theme color support to a WordPress site

functions.php

<?php
/**
 * Add support for a theme colour
 */
function add_theme_colour() {
	?>
	<meta name="theme-color" content="#BE702B" media="(prefers-color-scheme: light)">
	<meta name="theme-color" content="#333333" media="(prefers-color-scheme: dark)">
	<?php
}
add_action( 'wp_head', 'add_theme_colour' );

?>