Answer
The famous line "blue suede shoes" from Carl Perkins' hit 1955 song "Blue Suede Shoes" refers to a particular style of footwear that gained popularity in the mid-20th century. These shoes are characterized by their distinct bright blue suede upper, which gives them their name. Their popularity soared after being prominently mentioned in Perkins' song, making "blue suede shoes" an instantly recognizable cultural reference.