In Chinese usage, the cuckold (or wittol) is said to be “戴綠帽子” dài lǜmàozi, translated into English as ‘wearing the green hat’. The term is an allusion to the sumptuary laws used from the 13th to the 18th centuries that required males in households with prostitutes to wrap their heads in a green scarf (or later a hat).
Gonna give you the “wellll ackshually” here:
The original Robin Hood wore red, his hood the color of a robin, hence the name
It’s only since the Disney version everyone slaps him in green
“I’m going to hide in the forest and attack the Sheriff’s people. Now what should I wear?” Spots red hood.“Perfect!”
spoiler
Now, granted, robins aren’t really red, more a reddish brown that would absolutely blend into the trees, not unlike the birds.