Like running, it can take place on a track or as a road race. The main competitions take place at the Summer Paralympics which wheelchair racing and athletics has been a part of since 1960. Competitors compete in specialized wheelchairs which allow the athletes to reach speeds of 30 km/h or more.
Hue is one of the main properties (called color appearance parameters) of a color, defined technically (in the CIECAM02 model), as the degree to which a stimulus can be described as similar to or different from stimuli that are described as red, green, blue, and yellow  (the unique hues).
hue value, chroma, hue - A color's value is its brightness, its chroma is its strength, and its hue is its position in the spectrum. tone - A color variation with more variations than a shadeâhaving to do with the value (brightness) of a hue (position in the spectrum) or its chroma (saturation or purity).