Some advice on information about car buying? (Question 6: color)

Why are cars in the blue – blue-green – green family so rare?

These used to be very common and (I thought) popular colors.

Is it a matter of supply or demand or something else?

In my ongoing and so far fruitless shopping, I am getting very frustrated finding that once I’ve zeroed in on a make and model, just about all I have to choose from is black, white, silver, or gray. My answer: nope. And no to red.

Oddly, I’ve found the same right combination three times now, only to have the dealer fail to follow up as promised (“I’ll call you tomorrow”—> no call), resulting in no sale.