$stmt3 = $link->prepare('INSERT INTO messages VALUES(null, :room, :name, :message, :time, :color)');
$stmt3->execute(array(':room' => $Clean['room'],':name' => $Clean['name'],':message' => $Clean['message'],':time' => $time,':color:' => $Clean['color']));

$stmt3 = $link->prepare('INSERT INTO messages VALUES(:null, :room, :name, :message, :time, :color)');
$stmt3->execute(array(':null' => null, ':room' => $Clean['room'],':name' => $Clean['name'],':message' => $Clean['message'],':time' => $time,':color:' => $Clean['color']));

$stmt3 = $link->prepare('INSERT INTO messages (room, name, message, time, color) VALUES(:room, :name, :message, :time, :color)');
$stmt3->execute(array(':room' => $Clean['room'],':name' => $Clean['name'],':message' => $Clean['message'],':time' => $time,':color:' => $Clean['color']));

$stmt3->execute(array(
    ':room' => $Clean['room'],
    ':name' => $Clean['name'],
    ':message' => $Clean['message'],
    ':time' => $time,
    ':color' => $Clean['color'],
    ));

$stmt3->bindParam(':room', $Clean['room']);
$stmt3->bindParam(':name', $Clean['name']);
//and so on

$stmt3 = $link->prepare('INSERT INTO messages VALUES(null, ?, ?, ?, ?, ?)');
$stmt3->execute(array($Clean['room'], $Clean['name'], $Clean['message'], $time, $Clean['color']))