What are good wall colors for this combination? I'm installing a Calacatta Novo countertop with white high-gloss IKEA upper cabinets and Voxtorp walnut look base cabinets. Using simple 3x6 white subway tiles for backsplash with gray grout and Rawtech white tiled floor (looks like light concrete). I'm thinking of introducing some greige to shake things up instead of a more typical white like Simply White or Cloud Nine (which looks great in the pictures above!) - Worn Leather Shoe, Upper West Side, or Quicksand looked interesting in the Benjamin Moore online program. Any tips?

"More subtle" will need to be a perfectly PLAIN white or soft gray quartz. Take a sample of the Nuvo and head to a shop with all the samples. Take the backsplash sample with you. In any other circumstance I would say simply repeat the Nuvo on perimeter, but your perimeter turn dimension at 5" 9" will not allow a seam at center sink. The best place for a seam with this material, and strong vein.. Go shopping with samples in hand. Your selection process is already out of order, cabinetry color/stain first, counter tops, and backsplash, last. Pantry is quite a distance from the rest and hope you consider counter depth fridge. We aren't seeing the entire plan.........

I would want them the same color white. Pick the color for your cabinets, and match the paint and redo the trim.

I'm thinking either Simply White or Chantilly Lace would work with the Calacatta Nuvo slab. Get paint swatches of each and hold them up to the slab sample. Whiter is better, IMO.