Slippery Shale vs Grey Blue
Slippery Shale (Behr) and Grey Blue (RAL Classic) come from different manufacturers. Hue-wise, Slippery Shale belongs to the grey family and Grey Blue to the blue-grey family. The 11-point LRV gap — 18 for Slippery Shale vs 7 for Grey Blue — means Slippery Shale will open up a space more effectively. A ΔE of 21.9 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Slippery Shale vs Grey Blue in Real Spaces
2 real rooms side by side. Seeing Slippery Shale and Grey Blue in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Slippery Shale 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. Slippery Shale returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Slippery Shale vs Grey Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Slippery Shale on one side and Grey Blue 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 Slippery Shale comparisons
See how Slippery Shale stacks up against other well-photographed colors across different brands and tones.
