Grey Blue vs Functional Gray
Grey Blue (RAL Classic) and Functional Gray (Sherwin-Williams) come from different manufacturers. Hue-wise, Grey Blue belongs to the blue-grey family and Functional Gray to the greige-grey family. The 30-point LRV gap — 37 for Functional Gray vs 7 for Grey Blue — means Functional Gray will open up a space more effectively. A ΔE of 37.4 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Grey Blue vs Functional Gray in Real Spaces
3 real rooms side by side. Seeing Grey Blue and Functional Gray in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Functional Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Functional Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. Functional Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Grey Blue vs Functional Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Grey Blue on one side and Functional Gray 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 Grey Blue comparisons
See how Grey Blue stacks up against other well-photographed colors across different brands and tones.
