I personally hates that grey color. It is called champagne. That color looks sad like raining is about to come. I been looking for the used car market and those who grey color are just not selling. Now if you see someone with a grey car, it also means that grey was the only car left on the lot and they have no choice but to buy it. If it is a used car then same principle applies. You can't choose your color with used vehicles.
Red - stands out and usually the first car that cops will see and will give you that ticket. My mn cousin once bought his red corvette. His ticket numbers went up. He sold it right away. Red sports car to them is a gung ho speeder.
White - typical asian favorite. My neighbor, all their cars are white. Like literally this is not a coincidence. It is as though they are a flat family with no taste. I'm sure the color choice was made by the parents. If their kids want to buy a car, it has to get an approval from the parents first and yep, it'll be white again.
I used to sell toyotas while in college. 90% of the people I sold cars to, bought whatever cars I put them in for the test drive. It is weird to me that people are paying lots of money for a brand new car but yet, a lot of folks are not picking their color by choice. Maybe because they did not know there was a choice for them to do that. Those who know can demand for it but car selling is a science. I do things that leads them to follow my instruction.
These days, with a lack of vehicles on the lot, people can pre order and with that, they can choose their coloring.