Quartz Flint 1 vs Thunder Clouds

Quartz Flint 1 and Thunder Clouds come from the same Dulux collection. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. The 14-point LRV gap — 31 for Quartz Flint 1 vs 17 for Thunder Clouds — means Quartz Flint 1 will open up a space more effectively. Both share a neutral character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 16.7 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.