This reminds me of that fine children's book,
Go, Dog, Go , which Peter may not be familiar with given his childless state, but which Barb may know. Towards the end is the famous line, "I like that party hat!"
Today would have been a pretty fine day to try out a blue FDF hat in Peoples State Forest. 21 certified kills in under an hour of hiking.
Regarding the picture of Barb, it strikes me that the efficacy of a blue FDF hat could be compromised when wearing it with a blue shirt, but perhaps the shade of blue is the key.