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.
