Which thing green if you see in morning, black if you see in noon, blue if u see in evening and white if u see at night?

The thing which is green when you see it in the morning, black if you see it at noon, blue if you see it in the evening, and white if you see it at night is algae.
To be precise, this refers to blue-green algae, which are known to change color depending on the period of the day. These types of algae are known as cyanobacteria, and they can be harmful to the water they are found in, as well as to living beings.

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )