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
Canadian Olympic stamps Olympics. Rolf Harder, the designer of the Innsbruck Winter Games stamp, studied both Fine Arts and Graphic Arts at the Academy in Hamburg, and worked professionally in that city before coming to Canada in 1955. He has created a graphic design using the official Innsbruck Olympic Symbol combined with a stylized snow crystal. The blue-grey background represents a cold winter sky and serves to dramatize the five bright colours of the Olympic rings. The stamp for the 1980 Winter Olympic Games at Lake Placid, N. Y., was designed by Clermont Malenfant of Design G, Montreal. Using an action shot of