Is the colour of water really blue? Or is it white?

Water absorbs red light and reflects blue light. This makes water look blue, especially in large amounts.

Water scatters blue light more than other colours. This scattering makes the blue colour more visible.

Water looks bluer the deeper it is. In shallow water, other colours can mix in, but deeper water shows more blue.
 

Pure water is slightly blue, but things in the water can change its colour. Dirt or algae can make it look different.
 

Water can reflect the blue sky, making it look even bluer.

The colour of water can change based on what's around it, like the colour of the shore or the sunlight.
 

When water has things like algae or minerals, it can look green or other colours instead of blue.