I brought one with light gray leather and suede seats back in April and Heavy Metal color exterior. Finding one in those colors was like looking for a unicorn in the platinum trim and hybrid max option. I found one in North Carolina and had it shipped to Michigan. So far so good the light gray has been fine, no issues with staining. I had part of a cookie get into the leather seat but it wiped right out. The dealer did treat the interior with a spray treatment to prevent stains. Those types of treatments in my opinion are overpriced by the dealer. I was hoping the light gray would be a little cooler in the summer, I do have the bucket seats with the cooling and heating option.

 

Wanted to avoid driving inside a coffin so got the lt. gray, very happy with it. I do prefer the fake driftwood in the black interior vs. fake maple in lt. gray, maybe I'll do a pop & swap sometime.

If you find an available allocation early enough that matches your desired powertrain, trim, and with/without sunroof, dealer can change the interior/exterior colors.

 

I can't speak from experience, not owning one myself, but the 'light grey' seems to lean much more toward white than I'd prefer. Even though I'd like something a bit lighter so it doesn't cook so much in the sun, I don't really want to risk stains/discoloration over time.
I'd definitely avoid the light grey if you find yourself even just occasionally getting oily from working on vehicles or equipment.

 

We specifically went with the black interior since we didn't want to deal with stains especially having a little kid. In a previous car, I had a lighter grey interior and spilled some food in the passenger seat (lunch tipped over while turning and the lunchbox leaked) and I never was able to get that stain out even washing it multiple times.

 

I have the gray interior, no problems whatsoever.