Russia of Nicholas II on the eve of World War I was a land of striking ethnic diversity. Comprising all of the republics of what later was to become the Soviet Union, as well as present-day Finland and much of Poland, Russia was home to more than 150 million people - of which only about half were ethnic Russians.

These costumes are not only beautiful, there are also convenient in wearing because they were created for work as well.
The variety of colors for traditional costume displays love for beauty and ethnic diversity.

 
Actually, until the 17th century it were only outside trimmings that differed from nobles' costumes to the peasants' ones, general cut and style were all the same.
While clothes for noble people are introduced in the historical sources widely enough, there are not so many details for peasants' costumes.