So basically level 11 has 3 set color groups: [Could be a few more that I am not aware of] [Red-Orange-Pink-Purple] [White-Green-Cyan-Brown] [White-Green-Yellow-Brown] While we have that, the patterns are still randomized.

But the thing is, it is a lot faster and less RNG to trial and error one group: [Red-Orange-Pink-Purple] being the most common one from what I saw.

That is how @admiroo managed to get the color code that fast, atleast I think so. So that means going for only one group takes away 2/3 of the RNG and it leaves you only to those 4 colors. The time limit is 30 seconds after which it's pointless because the player would already get the code and reach the door.

The strategy maybe seems useless, but in a separate run [Level 11 Any%] 30 seconds is a big time loss.

Edit: This does not guarantee that you will get the door unlocked in one attempt. This is just a explanation on how it works and the fastest way to break it.