Evolution of human colour vision lights, which appear to be clear. Other colour perception issues include having trouble distinguishing yellows from reds and violet, lavender and purple from blue. In other cases, objects that reflect both red and blue light may appear to just be blue to these individuals. Deuteranopes, who are missing medium wavelength sensitive cones, are similar to protanopes in that they cannot distinguish between colours in the green-yellow-red part of the electromagnetic spectrum. However, deuteranopes do not suffer from dimming issues. For example, purple colors are not seen as being opposite to other colours in the spectrum but instead appear to be
Of the Blue Colour of the Sky Of the Blue Colour of the Sky Of the Blue Colour of the Sky is the third studio album by American rock band OK Go. It was released on January 12, 2010 on Capitol Records in the USA and EMI in the UK, and re-released on the band's independent label Paracadute Records on April 1. The album was produced by Dave Fridmann and was recorded in a span of seven months at Fridmann's Tarbox Road Studios in Cassadaga, New York. The album's name, lyrics, and concept are based on "The Influence of the Blue Ray of the Sunlight and of