Small Kitchen remodel, Ordering new Blanco one bowl undercount sink. Counter will most likely be a light multi colored gray/white mix. Cabinets are a medium(darker than walls)

gray and walls are a light gray with white molding. I am trying to decide between the darker "cinder" color or the mid range " metallic gray" with will most likely be closer to the cabinet color. The darker may add contrast but just not sure. I can not see color samples prior to purchase as no one has these colors in stock.

Question: Need suggestion on color option: is the Cinder too dark or does it add good contrast, is the metallic gray too boring or does it make more sense to stay in the lighter realm?