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).
(noun) - Color is the element of art that is produced when light, striking an object, is reflected back to the eye. There are three (3) properties to color. First is hue, which simply means the name we give to a color (red, yellow, blue, etc.). The second property is intensity, which refers to the strength and vividness of the color. For example, we may describe the color blue as royal (bright, rich, vibrant) or dull (grayed). The third and final property of color is its value, meaning its lightness or darkness. The terms shade and tint are in reference to value changes in colors. Pronunciation: cullÂ·er.