Benjamin Moore Charcoal Slate#646769 · LRV null
Charcoal Slate reads as a true neutral (no measurable hue) — very dark — reads black in most rooms. The notes below cover the spec, what Benjamin Moore HC-178 actually looks like under different light, and the closest matches at competing US brands.
Color spec
| Brand | Benjamin Moore |
| Name | Charcoal Slate |
| SKU | HC-178 |
| Hex | #646769 |
| RGB | 100, 103, 105 |
| HSL | 204°, 2%, 40% |
| LRV | null |
| Undertone | true neutral (no measurable hue) |
| Family | Gray |
About Benjamin Moore Charcoal Slate
At LRV null, Charcoal Slate is about as dark as paint gets — it reads near-black on a wall and reveals its character only in direct daylight or under warm bulbs. Because it carries almost no measurable hue, it stays a true neutral and pairs cleanly with nearly any trim or floor. In rooms with little natural light it can feel heavy, so reserve it for spaces you want to feel enveloping.
Charcoal Slate earns its keep as a statement: accent walls, a front door, cabinetry, a moody powder room, or exterior trim where you want sharp contrast. Grays like this read as a modern neutral and sit comfortably alongside both warm woods and cool metals.
Kompozit alternative
The closest hex in the Kompozit deck, ranked by ΔE2000 (perceptual color difference). ΔE under 2 is indistinguishable to most eyes; under 5 is a very close visual match.
Closest matches at every US brand
9 brands · top 5 each5 closest matches per brand by ΔE2000, computed against each brand's full deck. Tap any swatch for its full single-color spec; tap the brand title to browse all gray from that brand.
Sherwin-Williams
Dunn-Edwards
Valspar
Behr
Magnolia Home
Farrow & Ball
PPG / Glidden
Clare
Similar Benjamin Moore colors
closest in the Benjamin Moore deckThe nearest shades to Charcoal Slate within Benjamin Moore's own range, ranked by perceptual color distance — useful when you want the same look a touch lighter, darker, or warmer.
Coordinated palette
Generated by hue-rotating #646769 in HSL space. Pair Charcoal Slate with one accent and one neutral — the swatches below are starting points, not final picks.
Accessibility (WCAG contrast)
WCAG 2.1: AA = 4.5:1 normal text · AA Large = 3:1 large text · AAA = 7:1 normal text.