Because of the phytoplankton (one-cell plants that float on water and carry out photosynthesis) on the water. They are green.
Cerulean
Neptune and Uranus
If your eyes are blue with greenish brown specs on the outside ring of the pupil, can be considered as hazel because all are as a result of Rayleigh scattering of light in the stroma.
Aquamarine is a light blue-greenish colour.
The clouds have a little bit of a blue/green colour but what really makes that colour is the methane crystals in the upper atmosphere of Uranus gives it that blue/green appearance
turquoise
The colour of the sea is greenish blue because of the reflection of the sky
Amber.
Water appears greenish blue because its complimentary color red is absorbed by water molecules
teal is a four letter word for a greenish blue color ^_^
greenish blue
Cyan.
it is blue purple and greenish.
Then something must be wrong.
greenish blue
Uranus is a greenish blue, and Neptune is blue.
The color of a lake may just be the color of the sky, reflected in the lake, but if the water itself is actually greenish blue, that is caused by algae.