wp-includes/class-wp-duotone.php:205Converts a hue value to degrees from 0 to 360 inclusive.
$valuefloat$unitstringoptional'deg'float private static function colord_parse_hue( $value, $unit = 'deg' ) { $angle_units = array( 'grad' => 360 / 400, 'turn' => 360, 'rad' => 360 / ( M_PI * 2 ), ); $factor = $angle_units[ $unit ] ?? 1; return (float) $value * $factor; }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.