sanitize_hex_color() WordPress Function

The sanitize_hex_color() function is used to sanitize a hexadecimal color value. The function checks if the given value is a valid hex color code and if so, return the sanitized value. If the given value is not a valid hex color code, the function will return an empty string.

sanitize_hex_color( string $color ) #

function sanitize_hex_color( $color ) {
	if ( '' === $color ) {
		return '';
	}

	// 3 or 6 hex digits, or the empty string.
	if ( preg_match( '|^#([A-Fa-f0-9]{3}){1,2}$|', $color ) ) {
		return $color;
	}
}