eli5: Why is water clear in small amount but blue in large amount like an ocean?

Question

I thought it might be the reflection from the sky but if that was the case, why does the ocean appears more blue the deeper you go?

In: 2918

Answer 1

Get some blue water color paints. Put it On a white piece of paper. Put more water color. Is the water color a darker shade of blue now? It’s the same with water, just that water is a very very bright shade of blue