That depends on the country where the vehicle is registered and then perhaps the state of that country.
this is a rectangular(tetradic)color scheme,also a square color scheme
The numbers on a commercial vehicle have to be a "contrasting" color. They don't say WHICH color you have to use, because if they said something like "the numbers must be black" they'd have a problem because there are a lot of guys running around in black trucks. So...if the numbers are clearly visible against the side of the truck, they're fine.
WARM color scheme and COOL color schme
WARM color scheme and COOL color schme
Analogous color scheme uses colors that are adjacent to each other on the color wheel. This scheme creates a harmonious and cohesive look, as the colors blend well together.
Paint color on the outside of a vehicle such as the door, hood, truck, and roof. Car manufactures use the term to describe the color scheme in online and print car specifications.
The name of the color scheme is called "analogous." This color scheme uses colors that are next to each other on the color wheel, creating a harmonious and cohesive look.
what is color scheme?
Complimentary color scheme because they are at opposite ends of the color wheel.
Monochromatic color scheme.
An analogous color scheme includes a group of colors along one section of the color wheel. One analogous color scheme is red, red-orange, and orange. Another analogous color scheme is blue-green, blue, and blue-purple.
The primary color of focus in the new design scheme is blue.