Quartz grey vs Porpoise
Quartz grey (RAL Classic) and Porpoise (Sherwin-Williams) come from different manufacturers. Quartz grey reads as grey, while Porpoise reads as greige-grey — two distinct hue families, not close cousins. The 4-point LRV gap — 17 for Quartz grey vs 13 for Porpoise — means Quartz grey will open up a space more effectively. A ΔE of 1.3 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Quartz grey vs Porpoise in Real Spaces
3 real rooms side by side. Quartz grey and Porpoise are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. Quartz grey has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Quartz grey has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. Quartz grey reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Quartz grey vs Porpoise Simulated Comparison
5 simulated room previews — drag the slider on each to see Quartz grey on one side and Porpoise on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Quartz grey comparisons
See how Quartz grey stacks up against other well-photographed colors across different brands and tones.
