Thunder Clouds vs Mountain Pass
Where Thunder Clouds belongs to Dulux's range, Mountain Pass is a Sherwin-Williams color. Hue-wise, Thunder Clouds belongs to the grey family and Mountain Pass to the blue-grey family. Thunder Clouds (LRV 17) reflects noticeably more light than Mountain Pass (LRV 14), a difference of 3 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 4.5 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
Thunder Clouds vs Mountain Pass Simulated Comparison
5 simulated room previews — drag the slider on each to see Thunder Clouds on one side and Mountain Pass 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 Thunder Clouds comparisons
See how Thunder Clouds stacks up against other well-photographed colors across different brands and tones.
