Sea Urchin 3 vs Hardwick White
Sea Urchin 3 (Dulux) and Hardwick White (Farrow & Ball) come from different manufacturers. Sea Urchin 3 reads as blue, while Hardwick White reads as greige-grey — two distinct hue families, not close cousins. The 4-point LRV gap — 44 for Hardwick White vs 40 for Sea Urchin 3 — means Hardwick White will open up a space more effectively. Where Sea Urchin 3 leans cool, Hardwick White reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 16.3 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Sea Urchin 3 vs Hardwick White in Real Spaces
3 real rooms side by side. Seeing Sea Urchin 3 and Hardwick White 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. Hardwick White reads slightly lighter here — a subtle but real difference in how open the space feels.
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. Hardwick White has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. Hardwick White has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Sea Urchin 3 vs Hardwick White Simulated Comparison
5 simulated room previews — drag the slider on each to see Sea Urchin 3 on one side and Hardwick White 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 Sea Urchin 3 comparisons
See how Sea Urchin 3 stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 40, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 40), opening up a space where Sea Urchin 3 encloses it.
Sea Urchin 3 reflects far more light (LRV 40 vs 6), opening up a space where Iron Ore encloses it.
A 12-point LRV gap (52 vs 40) makes Purbeck Stone the marginally brighter of the two.
A 10-point LRV gap (40 vs 30) makes Sea Urchin 3 the marginally brighter of the two.
Mizzle reads slightly lighter (LRV 52 vs 40), a gap that shows most in low-lit rooms.
At LRV 60 vs 40, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 40), opening up a space where Sea Urchin 3 encloses it.
Sea Urchin 3 reflects far more light (LRV 40 vs 27), opening up a space where Denim Drift encloses it.
A 3-point LRV gap (43 vs 40) makes French Gray the marginally brighter of the two.
At LRV 40 vs 4, Sea Urchin 3 is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 40), opening up a space where Sea Urchin 3 encloses it.
Sea Urchin 3 reflects far more light (LRV 40 vs 13), opening up a space where Bancha encloses it.
At LRV 84 vs 40, Pure White is decisively the brighter choice.
At LRV 40 vs 21, Sea Urchin 3 is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 40), opening up a space where Sea Urchin 3 encloses it.
Shoji White reflects far more light (LRV 74 vs 40), opening up a space where Sea Urchin 3 encloses it.
Snowbound reflects far more light (LRV 83 vs 40), opening up a space where Sea Urchin 3 encloses it.
A 11-point LRV gap (51 vs 40) makes Pigeon the marginally brighter of the two.
Sea Urchin 3 reflects far more light (LRV 40 vs 12), opening up a space where Pewter Green encloses it.
Sea Urchin 3 reflects far more light (LRV 40 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 40), opening up a space where Sea Urchin 3 encloses it.
Their light reflectance is nearly identical (LRV 41 vs 40), so neither reads brighter in a room.
Sea Urchin 3 reflects far more light (LRV 40 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reads slightly lighter (LRV 45 vs 40), a gap that shows most in low-lit rooms.
A 9-point LRV gap (40 vs 31) makes Sea Urchin 3 the marginally brighter of the two.
At LRV 40 vs 7, Sea Urchin 3 is decisively the brighter choice.