wp-includes/class-wp-duotone.php:231Parses any valid Hex3, Hex4, Hex6 or Hex8 string and converts it to an RGBA object.
$hexstringarray|null private static function colord_parse_hex( $hex ) { $is_match = preg_match( '/^#([0-9a-f]{3,8})$/i', $hex, $hex_match ); if ( ! $is_match ) { return null; } $hex = $hex_match[1]; if ( 4 >= strlen( $hex ) ) { return array( 'r' => (int) base_convert( $hex[0] . $hex[0], 16, 10 ), 'g' => (int) base_convert( $hex[1] . $hex[1], 16, 10 ), 'b' => (int) base_convert( $hex[2] . $hex[2], 16, 10 ), 'a' => 4 === strlen( $hex ) ? round( (int) base_convert( $hex[3] . $hex[3], 16, 10 ) / 255, 2 ) : 1, ); } if ( 6 === strlen( $hex ) || 8 === strlen( $hex ) ) { return array( 'r' => (int) base_convert( substr( $hex, 0, 2 ), 16, 10 ), 'g' => (int) base_convert( substr( $hex, 2, 2 ), 16, 10 ), 'b' => (int) base_convert( substr( $hex, 4, 2 ), 16, 10 ), 'a' => 8 === strlen( $hex ) ? round( (int) base_convert( substr( $hex, 6, 2 ), 16, 10 ) / 255, 2 ) : 1, ); } return null; }Introduced in 6.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-duotone.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.