Cement grey vs Ionian
Where Cement grey belongs to RAL Classic's range, Ionian is a Sherwin-Williams color. Hue-wise, Cement grey belongs to the grey family and Ionian to the blue family. Cement grey (LRV 24) reflects noticeably more light than Ionian (LRV 20), a difference of 4 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 26.6, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cement grey vs Ionian in Real Spaces
1 real room side by side. Seeing Cement grey and Ionian in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. Cement grey reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Cement grey vs Ionian Simulated Comparison
5 simulated room previews — drag the slider on each to see Cement grey on one side and Ionian 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 Cement grey comparisons
See how Cement grey stacks up against other well-photographed colors across different brands and tones.
