The website and app ismy.blue shows users a series of colour blocks and asks them to click whether they are green and blue..

Why the Sky Changes Colors at Sunset. What causes those beautiful reds, ... resulting in a blue sky. During a sunset, however, light scattering works differently. ... causing them to block sunlight.

The website and app ismy.blue shows users a series of colour blocks and asks them to click whether they are green and blue. In this way, it determines where your personal boundary is on the colour ...