RAL 620-4 vs Piazza
Where RAL 620-4 belongs to RAL Effect's range, Piazza is a Tikkurila color. RAL 620-4 reads as blue, while Piazza reads as beige-greige — two distinct hue families, not close cousins. Piazza (LRV 65) reflects noticeably more light than RAL 620-4 (LRV 9), a difference of 56 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 52.1, 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.
RAL 620-4 vs Piazza in Real Spaces
3 real rooms side by side. Seeing RAL 620-4 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 RAL 620-4 would.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Piazza reflects noticeably more light off the walls, making the space read more open than RAL 620-4.
Color Details
RAL 620-4 vs Piazza Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 620-4 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 RAL 620-4 comparisons
See how RAL 620-4 stacks up against other well-photographed colors across different brands and tones.
