Colour centre in humans as an area specialized for colour vision. V2, also called the prestriate cortex, is believed to have a small role in colour processing by projecting signals from V1 to the V4-complex. Whether or not colour selective cells are present in V2 is still being investigated. Some optical imaging studies have found small clusters of red-green colour selective cells in V1 and V2, but not any blue-yellow colour selective cells. Other studies have shown that V2 is activated by colour stimuli, but not colour after images.[8] V4 also has feedback on V2, suggesting that there is a defined network
Colour guard are used in the military throughout the Commonwealth of Nations, including Australia, Canada, Jamaica, New Zealand, and the United Kingdom. A colour guard unit typically consists of the standard-bearer, who is of the rank of second lieutenant or equivalent (pilot officer or sub-lieutenant), positioned in the centre of the colour guard, flanked by two or more individuals, typically armed with rifles or sabres. A colour sergeant major typically stands behind the colours carrying a pace stick. So, the formation (when the colours are combined on parade) is as follows: Aside from presenting arms and sabres, colour guards of the Commonwealth