"odd" may be a poor choice of words. how about not ordered as often, or seldom seen or lower percentage colors. For instance I don't see to many silver with red interior cars, or white with red interior. They are not super rare, they are out there, my point was a champaign 69 or yellow with yellow hounds tooth interior I don't see as often and it would stand out in my memory. I see a lot of the orange with black vinyl top, obviously it was a popular choice back then.
Camaro the "hugger" sure you can associate it with hugger orange. Oddly enough the brochure which shows the "hugger" license plate is a green car.
I personally like Garnet Red, and looked for a long time to find the right condition Z that was a original Garnet Red car. After finding a bunch of cars repainted red, I found a nice one that still has much of the original paint intact.
If somebody has their eye out for a original Z that is Orange here is there chance.