Nocturne Blue vs Seaworthy
Nocturne Blue (Behr) and Seaworthy (Sherwin-Williams) come from different manufacturers. These are both blues, so the question isn't which hue to choose — it's where within blue to land. Their light reflectance values are nearly the same — 7 vs 7 — so neither will read significantly brighter or darker than the other. Where Nocturne Blue leans blue, Seaworthy reads cool — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 1.0 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Nocturne Blue vs Seaworthy in Real Spaces
3 real rooms side by side. Nocturne Blue and Seaworthy 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.
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. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
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. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Color Details
Nocturne Blue vs Seaworthy Simulated Comparison
5 simulated room previews — drag the slider on each to see Nocturne Blue on one side and Seaworthy 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 Nocturne Blue comparisons
See how Nocturne Blue stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 7), opening up a space where Nocturne Blue encloses it.
At LRV 83 vs 7, White Dove is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 7 vs 6), so neither reads brighter in a room.
Purbeck Stone reflects far more light (LRV 52 vs 7), opening up a space where Nocturne Blue encloses it.
Evergreen Fog reflects far more light (LRV 30 vs 7), opening up a space where Nocturne Blue encloses it.
At LRV 52 vs 7, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 7), opening up a space where Nocturne Blue encloses it.
At LRV 58 vs 7, Accessible Beige is decisively the brighter choice.
At LRV 27 vs 7, Denim Drift is decisively the brighter choice.
French Gray reflects far more light (LRV 43 vs 7), opening up a space where Nocturne Blue encloses it.
With LRVs of 7 and 4, the two reflect almost the same amount of light.
At LRV 55 vs 7, Tranquil Dawn is decisively the brighter choice.
A 7-point LRV gap (13 vs 7) makes Bancha the marginally brighter of the two.
At LRV 44 vs 7, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 7), opening up a space where Nocturne Blue encloses it.
Artichoke reflects far more light (LRV 21 vs 7), opening up a space where Nocturne Blue encloses it.
At LRV 66 vs 7, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 7, Shoji White is decisively the brighter choice.
At LRV 83 vs 7, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 7), opening up a space where Nocturne Blue encloses it.
A 5-point LRV gap (12 vs 7) makes Pewter Green the marginally brighter of the two.
Their light reflectance is nearly identical (LRV 8 vs 7), so neither reads brighter in a room.
At LRV 68 vs 7, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 7), opening up a space where Nocturne Blue encloses it.
A 5-point LRV gap (12 vs 7) makes Vintage Vogue the marginally brighter of the two.
At LRV 45 vs 7, Saybrook Sage is decisively the brighter choice.
Pale Green reflects far more light (LRV 31 vs 7), opening up a space where Nocturne Blue encloses it.