I just picked up the Cape Cod Blue leather case from Apple but I'll be returning it tomorrow. Just a bit too close to baby blue. The Forest Green one looks great in person - almost black in some light – so I'll swap them after picking up my Xs . Hopefully that one will age as well as my current Cosmos Blue one has
...don't forget that the Cape Cod will age over the months so it will indeed get darker.
My Cosmos Blue iPhone 8 Plus case has aged beautifully over the past year!