Blue ocean & clear bathtub water
The color of water can seem very different depending on distance, too.
A bathub or glass full of water always looks clear,letting you see your reflection. This is because it is being viewed over a short distance. Actually a glass of water is slightly blue. Depending on the water source the color of water is not always the same in deep water the water looks drak blue or bluish green because deep water only transmits a small amount off blue light the deeper the water the darker blue the ocean seems another factor that makes the ocean appear dark blue is the oxygen in the water sunlight is often scattered by the oxygen in the water making it harder to reflect the blue light