S 4010-G50Y vs Mountain Road
Where S 4010-G50Y belongs to NCS's range, Mountain Road is a Sherwin-Williams color. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. S 4010-G50Y (LRV 29) reflects noticeably more light than Mountain Road (LRV 23), a difference of 6 points that becomes especially apparent in rooms with limited natural light. S 4010-G50Y runs warm while Mountain Road is decidedly neutral, which means they'll respond very differently to warm vs cool light sources. The ΔE 6.7 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
S 4010-G50Y vs Mountain Road Simulated Comparison
5 simulated room previews — drag the slider on each to see S 4010-G50Y on one side and Mountain Road 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 S 4010-G50Y comparisons
See how S 4010-G50Y stacks up against other well-photographed colors across different brands and tones.
White Dove reflects far more light (LRV 83 vs 29), opening up a space where S 4010-G50Y encloses it.
At LRV 69 vs 29, Ammonite is decisively the brighter choice.
S 4010-G50Y reflects far more light (LRV 29 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 29, Purbeck Stone is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 30 vs 29), so neither reads brighter in a room.
Mizzle reflects far more light (LRV 52 vs 29), opening up a space where S 4010-G50Y encloses it.
At LRV 60 vs 29, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 29), opening up a space where S 4010-G50Y encloses it.
With LRVs of 29 and 27, the two reflect almost the same amount of light.
At LRV 43 vs 29, French Gray is decisively the brighter choice.
At LRV 29 vs 4, S 4010-G50Y is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 29), opening up a space where S 4010-G50Y encloses it.
S 4010-G50Y reflects far more light (LRV 29 vs 13), opening up a space where Bancha encloses it.
Hardwick White reflects far more light (LRV 44 vs 29), opening up a space where S 4010-G50Y encloses it.
At LRV 84 vs 29, Pure White is decisively the brighter choice.
A 8-point LRV gap (29 vs 21) makes S 4010-G50Y the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 29), opening up a space where S 4010-G50Y encloses it.
Shoji White reflects far more light (LRV 74 vs 29), opening up a space where S 4010-G50Y encloses it.
Snowbound reflects far more light (LRV 83 vs 29), opening up a space where S 4010-G50Y encloses it.
S 4010-G50Y reflects far more light (LRV 29 vs 12), opening up a space where Pewter Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 29), opening up a space where S 4010-G50Y encloses it.
A 12-point LRV gap (41 vs 29) makes Dix Blue the marginally brighter of the two.
At LRV 68 vs 29, Calamine is decisively the brighter choice.
A 4-point LRV gap (29 vs 25) makes S 4010-G50Y the marginally brighter of the two.
S 4010-G50Y reflects far more light (LRV 29 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reflects far more light (LRV 45 vs 29), opening up a space where S 4010-G50Y encloses it.
Their light reflectance is nearly identical (LRV 31 vs 29), so neither reads brighter in a room.
At LRV 29 vs 7, S 4010-G50Y is decisively the brighter choice.
A 5-point LRV gap (29 vs 24) makes S 4010-G50Y the marginally brighter of the two.
At LRV 57 vs 29, Guilford Green is decisively the brighter choice.