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Slightly off topic, but can anyone ELI5 why parts of the ocean way off the coast can be significantly lighter or darker shades of blue?
I always thought it was to show depth.
It is. The Mid-Atlantic Ridge is clearly visible in OP's picture as a ribbon of lighter blue.
Oh, I thought this was meant to be photorealistic minus clouds.
Well, it is, in that deeper water usually looks darker than shallow water
But, at the depths mostly involved, you would not see it. It's all near-bottomless. It's only meant to convey information evocatively.
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