Connections
Puzzle #667
🟦🟦🟦🟦
🟨🟨🟨🟨
🟩🟩🟩🟩
🟪🟪🟪🟪
no default today. Well, I thought my idea for purple was a bit ropey, but turns out it was correct!
(Edited to add, now I see the red herring. Ha, did not spot that at all!)