Benjamin Moore

Charcoal Slate

HC-178 / PM-8

Charcoal Slate is a dark gray with indigo undertones and a low reflectance. An LRV of 14.51 gives it a deep, shadowed read in most lighting. It works well for accent walls, media rooms, or exterior trim where a dark neutral is required.

Pair it with Benjamin Moore Classic Gray or Chantilly Lace for light contrast. Hale Navy or Kendall Charcoal reinforce the depth, while Smoky Green or Woodlawn Blue add muted color.

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Brand

Benjamin Moore

Code

HC-178 / PM-8

Collection

Historical Colors

Charcoal Slate in Real Homes (7 Photos)

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Charcoal Slate in Different Light

Light temperature is measured in Kelvin: a warm 2700K bulb pulls colors toward yellow, while 5000K daylight reads cooler and truer. Check the color at the time of day you actually use the room.

Artificial Lighting

Bedroom scene to simulate Benjamin Moore Charcoal Slate under artificial light

Light Temperature: 2700K

Natural Lighting

Living room scene to simulate Benjamin Moore Charcoal Slate under natural light

Light Temperature: 4500K

Technical Specifications

Undertones

Type

Blue

Strength

Very Low

Temperature

neutral

Hue Angle

204°

Cyan Family

Lightness

40%

Medium

Saturation

Near Neutral

LRV

14.5

0%100%

Very Dark

Dark

Medium

Light

Very Light

White

LRV measures how much light a color reflects, from 0 (black) to 100 (pure white). Below about 50 a color needs good lighting to avoid going flat, 60 and up helps brighten a room, and most whites sit above 80.

Color Position

Saturation →

Lightness →

Color Codes

HEX

#646769

RGB Decimal

100, 103, 105

RGB Percent

39.2%, 40.4%, 41.2%

HSL

204.0, 2.4%, 40.2%

HSV

204.0, 4.8%, 41.2%

CMYK

4.8%, 1.9%, 0.0%, 58.8%

YIQ

102.3, -2.4, -0.0

XYZ

12.66, 13.43, 15.29

CIE Lab

43.40, -0.73, -1.53

CIE Luv

43.40, -1.76, -1.92

Hunter Lab

36.65, -0.55, -1.17

Decimal

6580073

Coordinating Colors and Color Palettes

Darker Shades

Monochromatic dark

Charcoal Slate Sooty Lashes Dark Secret Black Blue

Lighter Shades

Monochromatic light

Charcoal Slate Steel Wool Gray Suit Lazy Gray

Complementary

Opposite on color wheel

Charcoal Slate Manor House Berry Brown Free Wheeling

Analogous

Adjacent colors

Charcoal Slate Script Ink Adrift at Sea Cloak Gray

Closest Paint Matches

Cross-brand matches are close, never exact. Each brand uses different bases and sheens, so sample before you buy gallons.

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