Why would the prisoner mention about "pink flamingo"? Is it a metaphor?

Native speaker’s answer
Rebecca
The prisoner mentions "pink flamingos" in reference to their pink clothes. In the movie, Paddington makes a mistake with the laundry and all the prisoners clothes turn pink! They didn't like that very much. Ex: They were so burnt from being outside that they looked like pink flamingos. Ex: Jane was dressed in all pink, and looked like a pink flamingo.