Why in the uk, car number plates are a diffrent colour?
They are white in the front with black letters and numbers, yellow on the rear of the car, with black numbers and letters, no one seems to know??
Answer
When reflective plates were introduced in 1972, the most easy to read is black lettering on white, so that was chosen for the front. however, in the uk it is illegal to have a white light source visible from the rear unless reversing, and that includes reflective sources, so another colour had to be found, and yellow was the next most clear to read, so that was chosen for the rear.