Complete luck today.
Thought I'd spotted a connection for 3 of the purples and so made a guess at the 4th, which was correct, but I hadn't actually made the right link 😀
Blue was totally by default. I had no clue.
Connections
Puzzle #442
🟨🟨🟨🟨
🟩🟩🟩🟩
🟪🟪🟪🟪
🟦🟦🟦🟦