How can I track sales of specific iPhone case colors?

Hey guys! So i’m starting to test out my website and figure out how it all works but i’m just not understanding one thing. so i have a phone case business but i print the cases by order so i need to keep track of the sales of the iphone sizes. if someone buys an iphone 11 case in green, i need it to keep track of the iphone 11 case in blue / if that makes sense.

In cart or checkout process it is shown as green correctly?