RAL 840-4 vs Sage Slate
Where RAL 840-4 belongs to RAL Effect's range, Sage Slate is a Valspar color. These are both greys, so the question isn't which hue to choose — it's where within grey to land. RAL 840-4 (LRV 21) reflects noticeably more light than Sage Slate (LRV 19), a difference of 3 points that becomes especially apparent in rooms with limited natural light. The ΔE 3.5 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
RAL 840-4 vs Sage Slate Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 840-4 on one side and Sage Slate 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 840-4 comparisons
See how RAL 840-4 stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 21, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 21), opening up a space where RAL 840-4 encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 21), a gap that shows most in low-lit rooms.
Agreeable Gray reflects far more light (LRV 60 vs 21), opening up a space where RAL 840-4 encloses it.
At LRV 58 vs 21, Accessible Beige is decisively the brighter choice.
A 6-point LRV gap (27 vs 21) makes Denim Drift the marginally brighter of the two.
French Gray reflects far more light (LRV 43 vs 21), opening up a space where RAL 840-4 encloses it.
At LRV 55 vs 21, Tranquil Dawn is decisively the brighter choice.
At LRV 44 vs 21, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 21), opening up a space where RAL 840-4 encloses it.
At LRV 66 vs 21, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 21, Shoji White is decisively the brighter choice.
A 10-point LRV gap (21 vs 12) makes RAL 840-4 the marginally brighter of the two.
At LRV 21 vs 8, RAL 840-4 is decisively the brighter choice.
At LRV 68 vs 21, Skimming Stone is decisively the brighter choice.
A 10-point LRV gap (21 vs 12) makes RAL 840-4 the marginally brighter of the two.
At LRV 45 vs 21, Saybrook Sage is decisively the brighter choice.
Pale Green reads slightly lighter (LRV 31 vs 21), a gap that shows most in low-lit rooms.