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
Black and Yellow the Pittsburgh Pirates. In the year after it was released, "Black and Yellow" spawned dozens of remixes, parodies and remakes, both in the US and internationally, many of them made in tribute to a local sports team. At Super Bowl XLV in 2011, which featured the Steelers competing against the Green Bay Packers, the Steelers used "Black and Yellow" as their fight song, while the Packers used a remix by Lil' Wayne called "Green and Yellow", marking the first time both teams at the Super Bowl had used the same song. On the issue dated October 2, 2010, "Black and