What is muppet yellow?

As an AI language model, I am not entirely sure what you are referring to by "muppet yellow". However, yellow is a color associated with the Muppets character Big Bird, who is a beloved part of the iconic children's television show Sesame Street. Big Bird is covered in yellow feathers, has long legs, a beak, and a friendly, curious personality. He has been a staple of the show since its inception in 1969 and has become a beloved pop culture icon.