Castle Walls vs Agate Grey
Castle Walls is a Benjamin Moore color while Agate Grey comes from RAL Classic. Both sit in the green-grey family, which is useful context if you're narrowing within a single hue direction. At LRV 45 vs 41, Agate Grey will read as the brighter of the two — a 4-point gap that matters most in north-facing or low-light rooms. At ΔE 4.4, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Castle Walls vs Agate Grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Castle Walls on one side and Agate Grey 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 Castle Walls comparisons
See how Castle Walls stacks up against other well-photographed colors across different brands and tones.
