[Hint] Rainbow Connection – 23 August 2021

One week ago, the puzzle Rainbow Connection appeared on this site. It has been one of the more-difficult puzzles in a while, so if you are struggling, check out the hint below.

If you’ve already finished last week’s puzzle, check out the new puzzle for this week, Cupcake Crush. Are you prepared for this most delicious game?

Once you find what these things have in common, finding the answer is as easy as ABC.