WordPress Custom colors in TinyMCE editor

TheSmithy Wordpress

Source: HOW TO ADD CUSTOM COLOURS TO TINYMCE 4 IN WORDPRESS 3.9+

function my_mce4_options( $init ) {
	$default_colours = '
		"000000", "Zwart"
		';
	$custom_colours = '
		"959c51", "Groen",
		"754c24", "Bruin",
		"e89638", "Oranje",
		"5796b5", "Blauw"
		';
	$init['textcolor_map'] = '['.$default_colours.','.$custom_colours.']';
	$init['textcolor_rows'] = 1;
	$init['textcolor_cols'] = 5;
	return $init;
}
add_filter('tiny_mce_before_init', 'my_mce4_options');