I would not want to accent a fridge. When I design, I try to make most appliances blend in or even hide. I usually try to draw focus to the space as a whole or something that deserves to be focused on.

I wouldn't use an accent colour or wallpaper on the outside of the pantry, though I would use either of those or stencilling to make the inside pretty.

I would however do an interesting door like this one with the frosted glass:

A Bright New Kitchen Brings in European Flair · More Info

Or this one with stencilling (stencilling is very Scandinavian though not really modern):

Spanish Colonial Remodel · More Info

I would not want to emphasize the pantry. I would paint the door the wall color

Thanks! We got rid of all upper cabinets, so we definitely need the pantry space!

Have you open the recessed items to make sure the doors open enough to pull out drawers & pullouts? test everything before securing in place. open drawers appliances, etc. especially in corners to make sure you have clearances.

IMO to add an accent wall with all the accents you already are planning will be too much. Just paint the wall the same as the rest of the kitchen but I always think pantry doors should be the same as the cabinets it is after all just a big cabinet.

I would have had them the same walnut, but they just discontinued the fronts that I had for the rest of the cabinets. :(

I think of a pantry as more of a closet than a cupboard, especially a stand-alone pantry like this one. So I wouldn't feel compelled to match the cabinet fronts. My first choices would be the ones I posted above, my next choice would be to match any nearby closet or interior doors, and if that isn't possible I would paint the door to match the walls.