The state flag of Ukraine

Why does the Ukrainian flag consist of blue and yellow colors? Do they really symbolize the sky and wheat? How and when did the blue-yellow flag appear and why did it become the symbol of Ukraine?
Text and texture: Olga Karakai
Design, animation: Ilona Struzhkova, Anton Donenko
Broadcaster: Arsen Bosenko
Sound director: Evgeny Shashkin
Music: Max Pollul
Editor and producer: Sergey Fomkin