I've been trying to solve this puzzle for about half an hour now and couldn't work out why nithing was resolving, and only just now realised - oh, there's two yellows! Could they be any closer?

I've been trying to solve this puzzle for about half an hour now and couldn't work out why nithing was resolving, and only just now realised - oh, there's two yellows! Could they be any closer?

I couldn't tell the 2 yellows apart at all! I did what I said I would never do again - I changed one of the yellows to a darker yellow and the other to a lighter yellow

I couldn't tell the 2 yellows apart at all! I did what I said I would never do again - I changed one of the yellows to a darker yellow and the other to a lighter yellow

The star looks sad. The similar yellows made this tricky.

The star looks sad. The similar yellows made this tricky.

Very nice.

Very nice.