Evolution of human colour vision similar. Tritanopes are missing the short wavelength sensitive opsins and see short wavelength colours in a green hue and dim compared to other colours. They may also see some short wavelength colours as black. Other perception problems include distinguishing yellow from pink or purple colours being perceived as shades of red. Researchers have found that trichromacy has advantages over dichromacy or anomalous trichromacy at further distances. This is believed to occur because visual cues such as shape decrease for colour vision as distance increases for targets of a smaller size. Using tests for spotting fruit pieces in bushes at distances
Blue Is the Colour Blue Is the Colour Blue Is the Colour is the fifth studio album from English band The Beautiful South, released in October 1996 through Go! Discs and in America through Ark 21 Records. Following the two singles "Pretenders to the Throne" and "Dream a Little Dream", which never featured on any album until the release of the second greatest hits "Solid Bronze" in 2001, it was named after a pub in Sheffield. The album continued the melancholic tone of its predecessor "Miaow", and is generally considered to be the band's darkest effort, reflecting Heaton's life at the time. This comes