Final answer:
Yves Saint Laurent is the French Couture Designer known for the 'Le Smoking' suit, the safari look, and for using models of color on the runway.
Step-by-step explanation:
The French Couture Designer known for the 'Le Smoking' tailored tuxedo suit for women, the safari look, and using models of color on the runway is Yves Saint Laurent. This innovation was part of the broader changes in French fashion, which played a significant role in the country's economy, especially during challenging times such as World War I. Yves Saint Laurent was a pioneering figure in fashion, not just for his iconic designs like 'Le Smoking' but also for his progressive choices in representing diversity on the fashion runway.