Cast Iron vs Piazza
Where Cast Iron belongs to Sherwin-Williams's range, Piazza is a Tikkurila color. Hue-wise, Cast Iron belongs to the grey family and Piazza to the beige-greige family. Piazza (LRV 65) reflects noticeably more light than Cast Iron (LRV 13), a difference of 52 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 42.5, 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 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cast Iron vs Piazza in Real Spaces
3 real rooms side by side. Seeing Cast Iron and Piazza in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The LRV gap is large enough that Piazza will make the room feel meaningfully brighter than Cast Iron would.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. Piazza reflects noticeably more light off the walls, making the space read more open than Cast Iron.
Color Details
Cast Iron vs Piazza Simulated Comparison
5 simulated room previews — drag the slider on each to see Cast Iron on one side and Piazza 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 Cast Iron comparisons
See how Cast Iron stacks up against other well-photographed colors across different brands and tones.
