Eternity vs Thundercloud Gray

Both from Benjamin Moore's palette. Eternity reads as grey, while Thundercloud Gray reads as blue-grey — two distinct hue families, not close cousins. They have nearly identical light reflectance values (52 vs 50), so they'll read as similarly Medium in most lighting conditions. Both lean blue, so they'll behave similarly in mixed or changing light conditions. At ΔE 2.5, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.