Why does the sky turn green when it rains?

Under normal circumstances, the rainy weather in the north and south is different, and the intensity of rain is also different. When clouds are dense on cloudy days, they sometimes appear a mixture of yellow and green. That's because the original sky is blue, and the thickness of clouds will appear yellow. When yellow meets blue, the color will collide and dissolve, which will make people mistakenly think it is green.