Charcoal Slate vs RAL 540-M
Where Charcoal Slate belongs to Benjamin Moore's range, RAL 540-M is a RAL Effect color. Hue-wise, Charcoal Slate belongs to the grey family and RAL 540-M to the pink-purple family. Charcoal Slate (LRV 15) reflects noticeably more light than RAL 540-M (LRV 6), a difference of 9 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 31.3, 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 6 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Charcoal Slate vs RAL 540-M in Real Spaces
6 real rooms side by side. Seeing Charcoal Slate and RAL 540-M 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 Charcoal Slate will make the room feel meaningfully brighter than RAL 540-M 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. Charcoal Slate reflects noticeably more light off the walls, making the space read more open than RAL 540-M.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. Charcoal Slate reflects noticeably more light off the walls, making the space read more open than RAL 540-M.
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. Charcoal Slate reflects noticeably more light off the walls, making the space read more open than RAL 540-M.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Charcoal Slate reflects noticeably more light off the walls, making the space read more open than RAL 540-M.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Charcoal Slate reflects noticeably more light off the walls, making the space read more open than RAL 540-M.
Color Details
Charcoal Slate vs RAL 540-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Charcoal Slate on one side and RAL 540-M 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 Charcoal Slate comparisons
See how Charcoal Slate stacks up against other well-photographed colors across different brands and tones.
