The classic film The Wizard of Oz revolutionized cinema with its use of color and some might mistakenly believe it to be the first color movie, but it didn't even pioneer the use of color on film. So, what was the first movie in color? The Wizard Of Oz instantly became iconic, and acclaimed for its excellent storytelling, heartfelt performances, innovative special effects, and musical score. But the element that helped the movie transcend to greatness was Technicolor, the most famous color process in Hollywood. With its highly saturated hues and completely natural representation of real-life color, the process marked the precedent for the mainstream use of color in every film that came afterward. However, it wasn't the first film in color.

https://screenrant.com/first-color-movie-world-flesh-devil-wizard-oz/