![]() The NWS says that the color of perception also has a lot to do with what something, like clouds, in the atmosphere appears to be, "A more common reason is the contrast between the background and foreground cloud overwhelms our vision. That is why fog often appears grey because it is at the surface, and the sun is blocked. If there is more haze or dust in the air, clouds can appear pink or orange.įor the cloud to appear grey, sunlight passing through the cloud or fog will need to be blocked or diminished. This white light combines all the colors in the visible spectrum. If it is daylight, the cloud usually will appear white because the sun provides ‘white’ light. The color of clouds or fog depends primarily on the color of light it receives. Even though it has a pollution particle inside, the cloud droplet is still essentially pure water.ĭepending on the temperature and dew point temperature, clouds or fog can form suddenly or take some time. This means that every cloud droplet has a bit of dirt, dust, or a salt crystal within it. Nuclei are tiny particles consisting of things like specks of soil, ocean spray, or smoke. With water or water vapor always being in the atmosphere, the actual molecules are too small to bond together. It is actually a layer of stratus clouds that are on or near the ground.įor a cloud to form, there needs to be water and nuclei. ![]() What is fog?įog is defined as tiny water droplets suspended in the air at Earth's surface. Like most things with the weather, the answer isn't linear, so let's break it down. Spoiler alert: Fog isn't just one specific color. But what does fog actually look like? Can it be green like Sherwin-Williams chose? They go on to say that it is a cool and refreshing color.
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