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 (song) Blue Is the Colour (song) Blue Is the Colour is a football song associated with Chelsea Football Club. It was performed by the squad and released in 1972 to coincide with the club's ultimately unsuccessful appearance in the League Cup final of that year against Stoke City. The record was issued on the Penny Farthing Records label and reached number 5 in the UK Charts and number 8 in Ireland in March 1972. It has become one of the most well-known English football songs. Singing squad members include: As of 2018, 46 years after the song was first released, it