Young Curly Red Haired Girl Reveals Her Cyan Shirt And Thong Panties On The Floor

Pure water is nearly colorless. However, it does absorb slightly more red light than blue, giving large volumes of water a bluish tint; increased scattering of blue light due to fine particles in the water shifts the blue color toward green, for a typically cyan net color.
Cyanide derives its name from Prussian blue, a blue pigment containing the cyanide ion.
• Bacteria
Cyanobacteria (sometimes called blue-green algae) are an important link in the food chain.