Whether Louboutin’s red-sole trademark can be protected in the fashion industry and enforced against YSL’s all-red shoes.
Holding
A single color can serve as a fashion trademark. Louboutin’s mark is protectable when its lacquered red outsole contrasts with the shoe’s upper, but it does not extend to YSL’s monochrome red shoes.
Reasoning
Under Qualitex, color is not categorically excluded from trademark protection. The district court therefore erred in treating every single-color fashion mark as functional. Aesthetic functionality requires a fact-specific inquiry into whether exclusive use would put competitors at a significant disadvantage unrelated to the mark’s reputation.
A single color generally must acquire secondary meaning: consumers must recognize it as identifying a source, rather than merely as a product feature. Louboutin’s advertising, sales, media attention, and consistent use showed that a red outsole contrasting with the rest of the shoe had come to identify his brand.
The evidence did not show the same source-identifying meaning when a red outsole appeared on an entirely red shoe. The court therefore used its authority under the Lanham Act to limit the registration to lacquered red outsoles that contrast with the shoe’s upper.
YSL’s all-red shoe fell outside the mark as limited, so Louboutin could not obtain the requested injunction. The court did not decide whether use of the modified mark would cause consumer confusion or whether that mark was functional.