Castle Stone vs Cement grey
Where Castle Stone belongs to PPG's range, Cement grey is a RAL Classic color. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. Cement grey (LRV 24) reflects noticeably more light than Castle Stone (LRV 9), a difference of 15 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 17.9, 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
Castle Stone vs Cement grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Castle Stone on one side and Cement 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 Stone comparisons
See how Castle Stone stacks up against other well-photographed colors across different brands and tones.
