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).
The word color is the general term which applies to the whole subject - red, orange, yellow, green, blue, violet, black and white and all possible combinations thereof. Hue is the correct word to use to refer to just the pure spectrum colors. Any given color can be described in terms of its value and hue.