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
Cambridge Blue (colour) Cambridge Blue (colour) Cambridge Blue is the colour commonly used by sports teams from the University of Cambridge. There is considerable dispute regarding the exact shade of the colour that should be used. Most notably, the colour used by the Cambridge University Boat Club is different from that used by Cambridge University R.U.F.C.. The current Boat Club colour was created when Alf Twinn, Cambridge University boatman 1934–1984, added more yellow to this shade, allegedly in order to distinguish it from the rugby club's colour. The Cambridge University official colour style guide defines Cambridge Blue as Pantone 557; with RGB values