Green, the mixture of blue and yellow, can be seen everywhere and in countless shades. In fact, the human eye sees green better than any color in the spectrum. Humans are trichromats, meaning we perceive three primary colors: blue, green and red. The retina in a human eye can detect light between wavelengths of 400 and 700 nanometers, a range known as the visible spectrum.

In the middle of the spectrum resides the color green, at around 555 nanometers. This wavelength is where our perception is at its best. Because of its position in the center of the spectrum, both blue and red light waves are enhanced and better perceived with the help of green waves.

Some scientists and researchers also believe that because our eyes are at the peak of their perception to detect the wavelengths corresponding with the color green, the shade may calm us down.

With less strain to perceive the colors, our nervous system can relax when perceiving the tone.

More Info: edition.cnn.com