What are the colors that indicate sunny days on satellite cloud pictures?

Blue represents the ocean and green represents the land.

White or gray areas represent cloud areas, and the thickness of clouds varies from place to place.

The grayer the cloud is, the thinner it is. This is just the opposite of the color of clouds that observe the sky in real life.

I read your supplement. The whiter and thicker the cloud color on the satellite cloud image. So white is a rainy area.