St. Pauls Blue vs Black grey
St. Pauls Blue (Jotun) and Black grey (RAL Classic) come from different manufacturers. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. The 10-point LRV gap — 17 for St. Pauls Blue vs 6 for Black grey — means St. Pauls Blue will open up a space more effectively. A ΔE of 27.6 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
St. Pauls Blue vs Black grey in Real Spaces
1 real room side by side. Seeing St. Pauls Blue and Black grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. St. Pauls Blue reflects noticeably more light off the walls, making the space read more open than Black grey.
Color Details
St. Pauls Blue vs Black grey Simulated Comparison
5 simulated room previews — drag the slider on each to see St. Pauls Blue on one side and Black 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 St. Pauls Blue comparisons
See how St. Pauls Blue stacks up against other well-photographed colors across different brands and tones.
