wp-includes/formatting.php:6388Ensures that any hex color is properly hashed.
$colorstringstringfunction maybe_hash_hex_color( $color ) { $unhashed = sanitize_hex_color_no_hash( $color ); if ( $unhashed ) { return '#' . $unhashed; } return $color;}Introduced in 3.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/formatting.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.