Why Does HULK Wear PURPLE PANTS?

Marvel's Incredible Hulk is a character with one of the most iconic color schemes: Bright green skin contrasted with purple pants. It's visually striking, but besides that, why does Hulk wear purple pants?? Does Bruce Banner simply like the color purple, or do the ripped violet shorts serve as a symbol for his constant inner struggle and how the Marvel Universe often paints Hulk as a villain instead of superhero? Hulk's pants might be more than they may seem at first!