Connections
Puzzle #615
🟦🟦🟦🟦
🟪🟪🟪🟪
🟩🟩🟩🟩
🟨🟨🟨🟨

Skill 98/99
Uniqueness 1 in 1,068

Thought for sure blue would be the purple

Purple was just my leftovers initially, but after my first guess turned out not to be purple, I quickly realised what the leftovers had in common, before I guessed purple officially.