And, if the car is garaged in addition to being kept clean and waxed, it will still look very good many years later. I have had cars of virtually any color that you can name and they all looked showroom new–even after as many as 10 years–because they were kept clean, waxed, and garaged at night.
The only exception was my POS '74 Volvo, whose paint was totally chalked on the horizontal surfaces after only 2 years. However, at that time, I lived in a town that had a lot of industrial pollution from refineries, chemical plants, and pharma companies. I suspect that these airborne contaminants ruined the paint on that car.