RAL 770-4 vs Zinc Luster
Where RAL 770-4 belongs to RAL Effect's range, Zinc Luster is a Sherwin-Williams color. These are both greige-greys, so the question isn't which hue to choose — it's where within greige-grey to land. Zinc Luster (LRV 23) reflects noticeably more light than RAL 770-4 (LRV 20), a difference of 4 points that becomes especially apparent in rooms with limited natural light. The ΔE 4.6 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 770-4 vs Zinc Luster in Real Spaces
3 real rooms side by side. RAL 770-4 and Zinc Luster are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
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 brightness difference is modest but present — Zinc Luster gives the walls a little more lift.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Zinc Luster reads slightly lighter here — a subtle but real difference in how open the space feels.
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. Zinc Luster reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
RAL 770-4 vs Zinc Luster Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 770-4 on one side and Zinc Luster 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 770-4 comparisons
See how RAL 770-4 stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 20, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 20), opening up a space where RAL 770-4 encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 20), a gap that shows most in low-lit rooms.
Agreeable Gray reflects far more light (LRV 60 vs 20), opening up a space where RAL 770-4 encloses it.
At LRV 58 vs 20, Accessible Beige is decisively the brighter choice.
A 7-point LRV gap (27 vs 20) makes Denim Drift the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 20), opening up a space where RAL 770-4 encloses it.
At LRV 55 vs 20, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 20, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 20), opening up a space where RAL 770-4 encloses it.
At LRV 66 vs 20, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 20, Shoji White is decisively the brighter choice.
A 8-point LRV gap (20 vs 12) makes RAL 770-4 the marginally brighter of the two.
At LRV 68 vs 20, Skimming Stone is decisively the brighter choice.
A 8-point LRV gap (20 vs 12) makes RAL 770-4 the marginally brighter of the two.
At LRV 45 vs 20, Saybrook Sage is decisively the brighter choice.
Pale Green reads slightly lighter (LRV 31 vs 20), a gap that shows most in low-lit rooms.
RAL 770-4 reflects far more light (LRV 20 vs 7), opening up a space where Pine Needle encloses it.
Cement grey reads slightly lighter (LRV 24 vs 20), a gap that shows most in low-lit rooms.
Guilford Green reflects far more light (LRV 57 vs 20), opening up a space where RAL 770-4 encloses it.