I think people care more than you think and it's mostly an effect of the limited options setting the tone/culture for most of society so when "exciting" colors randomly come out, nobody wants to stand out amongst the sea of silver/black/white. I bet if cars became more funky on average, people would exercise a lot more freedom in selecting wilder colors. An example of a culture of fun selection is snow sports. Colors rule the landscape, and yes sometimes for safety, but it's also because it highlights personality.
Agreed. I care about the color, but not enough to wait for "special order" so I end up taking whatever is in stock at the dealership, which is always the bland colors. I love a green car, but there's almost never an option (or the green is hideous)