Oranges and Tangerines

Oranges are orange.

Tangerines are tangerine.

But what happens if I have a tangerine Orange? Or an orange Tangerine?

Is that how they sort them in the supermarket?

Peppers start off green, then go red, then orange and then yellow. So do they get migrated from section to section? Are all the yellow ones really old green ones?

Also by the above logic should a Banana be called a Yellow.