Castlegate vs Steely Gray
Both from Sherwin-Williams's palette. Castlegate reads as grey, while Steely Gray reads as blue-grey — two distinct hue families, not close cousins. Castlegate (LRV 37) reflects noticeably more light than Steely Gray (LRV 30), a difference of 7 points that becomes especially apparent in rooms with limited natural light. Both lean neutral, so they'll behave similarly in mixed or changing light conditions. The ΔE 5.8 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Castlegate vs Steely Gray in Real Spaces
2 real rooms side by side. Castlegate and Steely Gray 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 brightness difference is modest but present — Castlegate gives the walls a little more lift.
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. Castlegate reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Castlegate vs Steely Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Castlegate on one side and Steely Gray 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 Castlegate comparisons
See how Castlegate stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 37, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 37), opening up a space where Castlegate encloses it.
Castlegate reflects far more light (LRV 37 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 37, Purbeck Stone is decisively the brighter choice.
A 7-point LRV gap (37 vs 30) makes Castlegate the marginally brighter of the two.
Mizzle reflects far more light (LRV 52 vs 37), opening up a space where Castlegate encloses it.
At LRV 60 vs 37, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 37), opening up a space where Castlegate encloses it.
Castlegate reads slightly lighter (LRV 37 vs 27), a gap that shows most in low-lit rooms.
A 6-point LRV gap (43 vs 37) makes French Gray the marginally brighter of the two.
At LRV 37 vs 4, Castlegate is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 37), opening up a space where Castlegate encloses it.
Castlegate reflects far more light (LRV 37 vs 13), opening up a space where Bancha encloses it.
Hardwick White reads slightly lighter (LRV 44 vs 37), a gap that shows most in low-lit rooms.
At LRV 84 vs 37, Pure White is decisively the brighter choice.
At LRV 37 vs 21, Castlegate is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 37), opening up a space where Castlegate encloses it.
Shoji White reflects far more light (LRV 74 vs 37), opening up a space where Castlegate encloses it.
Snowbound reflects far more light (LRV 83 vs 37), opening up a space where Castlegate encloses it.
At LRV 51 vs 37, Pigeon is decisively the brighter choice.
Castlegate reflects far more light (LRV 37 vs 12), opening up a space where Pewter Green encloses it.
Castlegate reflects far more light (LRV 37 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 37), opening up a space where Castlegate encloses it.
A 4-point LRV gap (41 vs 37) makes Dix Blue the marginally brighter of the two.
Castlegate reflects far more light (LRV 37 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reads slightly lighter (LRV 45 vs 37), a gap that shows most in low-lit rooms.
A 6-point LRV gap (37 vs 31) makes Castlegate the marginally brighter of the two.