Be careful if you have a cut or scratch on your scalp, because openings in the skin are a prime target for infection. Also avoid sharing hats or any other type of clothing that might come into contact with your head -- some scalp conditions are easily passed from one person to the next [source: Berman ].
If there is a color that symbolizes denial it would be gray. Gray is not really a color but just a value of white mixed with black. Gray is commonly used as to represent the unknown. It is a symbol of questionable morality. Designers use gray to make something fade into the background. When a person is in denial, they may relate to the color gray, because they may be wrong/bad, but they feel as if they are right/good.
Ninety-nine percent of people with color blindness have difficulty distinguishing between red and green. The absence of one pigment will cause red-green colorblindness. The absence of two pigments will make it difficult to distinguish between blue and yellow as well as green and red. Achromatopsia, the rarest kind of colorblindness, involves the absence of all three pigments. People suffering from this form of color blindness can only see in black, white and gray.