Im pretty sure, that cops give more tickets to red vehicles than any other color because Red is a fast color
Okay again with color and speed. Color is not a function of spread but of wave length. Many would throw pigment into the argument but pigment because inconsequential when objects are in motion. Two objects in motion irregardless of speed or color will either produce or reflect light and light has wave length. Irregardless of initial color if the two objects are approaching other the wave length compresses or shortens the more compressed the bluer it appears, if the objects are moving apart the wave length is stretched or lengthened the more stretched the redder it appears. So my black raider will look blue as I approach you and red as leave you. Thus black raiders needs no color, while slower vehicles do.