Thunder Clouds vs Grey Blue
Where Thunder Clouds belongs to Dulux's range, Grey Blue is a RAL Classic color. Thunder Clouds reads as grey, while Grey Blue reads as blue-grey — two distinct hue families, not close cousins. Thunder Clouds (LRV 17) reflects noticeably more light than Grey Blue (LRV 7), a difference of 10 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 13.8, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. 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 Grey Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Thunder Clouds on one side and Grey Blue 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.
