What color is a cloud and why does it appear that way?

Clouds can appear white, gray, or even dark depending on the amount of sunlight they reflect and the thickness of the cloud. The color of a cloud is mainly influenced by the scattering of sunlight by water droplets or ice crystals in the cloud. When sunlight hits a cloud, the water droplets or ice crystals scatter the light in all directions, making the cloud appear white or gray. Thicker clouds can appear darker because they absorb more sunlight and reflect less light.