"I do not monopolize a color, I have put a color at a place where nobody has put it, and became, becoming iconic, as a trademark," he told "Nightline" in 2011. "I do not monopolize more colors, and Hermes is monopolizing the orange of their bag, or Tiffany has a blue. It's just the way it is. At one point, it makes part of your identity. It is my trademark."
The designer said he first came up with the idea for painting the sole red in 1992, when the prototype of a shoe he created came in, but seemed to be lacking something.
"I had a girl working with me, trying on the shoes," Louboutin said. "So when she was not trying on shoes, she sort of had nothing to do, so she was sort of waiting, and, so she was doing her nails, at that time... and I thought, why, this black has to be the red! So I grabbed her nail polish, and painted the soles."
It was then that his signature red sole was born. Louboutin said wearing shoes is a study in psychology. For women who may not feel comfortable with their bodies, in his shoes, he said, they will at least like their feet.
"I would say that a good shoe is exactly like a good wine," Louboutin said. "These shoes are going to stay and last for a long time."
The Associated Press contributed to this report