Stratus cloud can range from dark grey to white. It is not so high in the sky, but does not usually bring rain. However it makes the day seem dark and gloomy.
The word ‘stratus’ comes from Latin, and simply means ‘layer’ or ‘blanket’. Sometimes stratus cloud can perform an amazing effect as in the photo above.
thiNK TWice 
It does look like a blanket!
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Yes, this is the cloud responsible for all those grey, overcast days.
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