design house Christian Louboutin historically produces shoes with red soles, the color of which is drastically different from the color of the upper. And who would have known that this could lead to a lawsuit.
The fact is that the fashion house Yves Saint Laurent (YSL) also produces shoes with red soles. This is what caused the lawsuit from Christian Louboutin, who said that this could mislead buyers.

The legal process took almost a year. As a result, it was ruled that Christian Louboutin gets exclusive rights to the red sole, provided that it contrasts significantly with the upper of the shoe. That is, YSL can safely release shoes with red tops and red soles, but not shoes with black tops and red soles.
It is interesting that both companies declared the decision of the court their victory. The fact is that YSL has been producing all-red shoes since the 70s of the last century.