St. Pauls Blue vs Improbable
Where St. Pauls Blue belongs to Jotun's range, Improbable is a PPG color. Hue-wise, St. Pauls Blue belongs to the blue-grey family and Improbable to the grey family. They have nearly identical light reflectance values (17 vs 17), so they'll read as similarly Dark in most lighting conditions. At ΔE 2.3, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
St. Pauls Blue vs Improbable in Real Spaces
4 real rooms side by side. St. Pauls Blue and Improbable 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.
Living Room
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Color Details
St. Pauls Blue vs Improbable Simulated Comparison
5 simulated room previews — drag the slider on each to see St. Pauls Blue on one side and Improbable 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.
At LRV 83 vs 17, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 17), opening up a space where St. Pauls Blue encloses it.
A 11-point LRV gap (17 vs 6) makes St. Pauls Blue the marginally brighter of the two.
Purbeck Stone reflects far more light (LRV 52 vs 17), opening up a space where St. Pauls Blue encloses it.
Evergreen Fog reflects far more light (LRV 30 vs 17), opening up a space where St. Pauls Blue encloses it.
At LRV 52 vs 17, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 17), opening up a space where St. Pauls Blue encloses it.
At LRV 58 vs 17, Accessible Beige is decisively the brighter choice.
A 10-point LRV gap (27 vs 17) makes Denim Drift the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 17), opening up a space where St. Pauls Blue encloses it.
St. Pauls Blue reflects far more light (LRV 17 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 17, Tranquil Dawn is decisively the brighter choice.
A 3-point LRV gap (17 vs 13) makes St. Pauls Blue the marginally brighter of the two.
At LRV 44 vs 17, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 17), opening up a space where St. Pauls Blue encloses it.
Artichoke reads slightly lighter (LRV 21 vs 17), a gap that shows most in low-lit rooms.
At LRV 66 vs 17, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 17, Shoji White is decisively the brighter choice.
At LRV 83 vs 17, Snowbound is decisively the brighter choice.
A 5-point LRV gap (17 vs 12) makes St. Pauls Blue the marginally brighter of the two.
At LRV 68 vs 17, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 17), opening up a space where St. Pauls Blue encloses it.
Calamine reflects far more light (LRV 68 vs 17), opening up a space where St. Pauls Blue encloses it.
Treron reads slightly lighter (LRV 25 vs 17), a gap that shows most in low-lit rooms.
A 5-point LRV gap (17 vs 12) makes St. Pauls Blue the marginally brighter of the two.
At LRV 45 vs 17, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 17), opening up a space where St. Pauls Blue encloses it.
St. Pauls Blue reads slightly lighter (LRV 17 vs 7), a gap that shows most in low-lit rooms.
Cement grey reads slightly lighter (LRV 24 vs 17), a gap that shows most in low-lit rooms.
Guilford Green reflects far more light (LRV 57 vs 17), opening up a space where St. Pauls Blue encloses it.