Black blue vs Stone grey
Both from RAL Classic's palette. Hue-wise, Black blue belongs to the blue family and Stone grey to the grey family. Stone grey (LRV 29) reflects noticeably more light than Black blue (LRV 5), a difference of 25 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 49.6, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Black blue vs Stone grey in Real Spaces
3 real rooms side by side. Seeing Black blue and Stone grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Stone grey reflects noticeably more light off the walls, making the space read more open than Black blue.
Front Door
A front door is a focal point — small color differences read clearly at this concentrated scale. The LRV gap is large enough that Stone grey will make the room feel meaningfully brighter than Black blue would.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Stone grey reflects noticeably more light off the walls, making the space read more open than Black blue.
Color Details
Black blue vs Stone grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Black blue on one side and Stone grey 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 Black blue comparisons
See how Black blue stacks up against other well-photographed colors across different brands and tones.
