GREYS

Iron Mountain

#64777A

RGB 100, 119, 122 · HSL 188°, 10%, 44% · CMYK 18, 2, 0, 52

Iron Mountain is #64777A in HEX — rgb(100, 119, 122), hsl(188°, 10%, 44%), cmyk(18%, 2%, 0%, 52%).

Iron Mountain pulls into the rich end of the greys spectrum — HSL 188°, 10%, 44%. The neutral saturation makes it near-neutral and forgiving, and the hue reads cool. In interior projects it shines on walls, soft furniture, hard surfaces — as the project's quiet backbone. Reads best alongside white trim, natural wood, brass, soft black accents.

Color Codes

HEX#64777A

RGB100, 119, 122

HSL188°, 10%, 44%

HSV188°, 18%, 48%

CMYK18, 2, 0, 52

Decimal6584186

CSS RGBrgb(100, 119, 122)

CSS HSLhsl(188, 10%, 44%)

Paint Matches — this color across 16 brands

Behr

Iron Mountain N520-5

Exact match

PPG

Night Rendezvous 1037-5

ΔE 1.9 · #66787E

Hallman-Lindsay

Paradise City 486

ΔE 2 · #5F7475

Vista Paint

Portsmouth Blue C-1366

ΔE 2.1 · #5E7275

Kilz

Classic Movie RM120

ΔE 2.1 · #6B7A7C

Sherwin-Williams

Mediterranean SW7617

ΔE 2.2 · #60797D

Benjamin Moore

Charlotte AC-24

ΔE 2.2 · #677A80

Farrow & Ball

De Nimes 299

ΔE 2.2 · #6A7C80

Dulux

Becker Blue S29A6

ΔE 2.9 · #607979

Dunn-Edwards

Pike Lake DE6320

ΔE 3.1 · #6C7779

Valspar

Relaxed Navy 5001-2B

ΔE 3.2 · #647176

Colorhouse

Wool .05 Wool-05

ΔE 5 · #587675

IKEA

IKEA154 154

ΔE 5.8 · #667480

RAL

Squirrel Grey 7000

ΔE 6.7 · #78858B

Dutch Boy

Ocean Blue D-6743

ΔE 7.9 · #4C6A74

Kobra

Grey 42

ΔE 12.1 · #889099

Light Reflectance & Undertone

Light Reflectance Value (LRV)

17/100

Dark

0 · DarkLight · 100

Soaks up light and feels moody and intimate. Great for studies, dining rooms and accent walls; pair with ample lighting.

Undertone

TemperatureCool MasstoneTeal UndertoneGreen

A near-neutral with a subtle cool green undertone — it will pick up colour from surrounding surfaces and shift noticeably under different light.

Color Theory

Complementary

#64777A

#7B6865

Analogous

#657B73

#64777A

#656D7B

Triadic

#64777A

#7B6578

#787B65

Split-Complementary

#64777A

#7B656D

#7B7365

Tetradic

#64777A

#73657B

#7B6865

#6D7B65

Monochromatic

#202627

#434F51

#64777A

#8C9EA1

#B6C2C3

Rectangle

#64777A

#68657B

#7B6865

#787B65

Compound

#64777A

#656D7B

#7B6865

#7B7365

Variations

Lighter

#819598

#A2AFB1

#CAD0D1

Darker

#506163

#374344

#202728

Saturation

#6D7374

#65787B

#329DAE

Interior Use

Best Rooms

living rooms, bedrooms, bathrooms

Best Uses

walls, soft furniture, hard surfaces

Pairs With

white trim, natural wood, brass, soft black accents

Accessibility (WCAG)

vs White

4.71:1

vs Black

4.46:1

AA Large

Deuteranopia

#64777A

#6F717B

Original → Simulated

Protanopia

#64777A

#74747A

Original → Simulated

Tritanopia

#64777A

#647776

Original → Simulated

Color Psychology

Quiet · Versatile

Iron Mountain gets out of the way so the architecture and the people in the room do the work. The right neutral is never a default — it reads warm or cool, dusty or sharp depending on its undertone, and that undertone is what makes or breaks the room.

SymbolismBalance, sophistication, calm

PersonalityAdaptable, considered, timeless

versatileneutraltimelessbackdroptrimwall

How it looks under different light

#8A8677

Warm Bulb 2700K

Incandescent / soft white LED — pulls colour toward yellow/amber.

#64777A

Daylight 5500K

Midday natural light or daylight-spec LED — closest to the paint chip.

#788B9B

Cool Bulb 6500K

Cool white LED / overcast daylight — pulls colour toward blue.

Pairs With

#EAEBEB

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F7F7

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#774E48

Accent

Complementary punch

Hue +180°, slightly muted for paint vs. screen — use on a door, frame, or single piece.

#574738

Floor

Walnut neutral

Warm mid-brown grounds the scheme regardless of hero hue.

Paint Info

Brand · Product Line

Benjamin Moore / Regal Select Interior

Recommended Finishes

Eggshell (walls) · Pearl (trim) · Matte (ceiling)

Eggshell hides imperfections on main walls while keeping the color rich; pearl on trim adds subtle sheen and easier cleaning; flat matte on ceilings prevents glare.

Best Surfaces

Primary walls · Cabinetry · Doors · Mouldings

Coverage & Dry Time

Typical coverage 350-400 sq ft per gallon over a primed surface.

Touch-dry in ~1 hour. Recoat after 4 hours. Full cure 7-14 days.

Primer

Standard primer is adequate.

Application Tip

Use a 9" microfiber roller on walls and a 2.5" angled sash brush for trim cuts. Two coats minimum for even depth.

Paint Calculator

Wall area (m²)

Coats

Coverage (m² / L)

You'll need

4.0 litres

1.06 US gallons · room for one touch-up coat. Buy slightly more to ensure single-batch match.

Code Snippets

CSS — color

color: #64777A;

CSS — background

background-color: #64777A;

CSS Variable

--color-iron-mountain: #64777A;

Tailwind v3 — config

colors: { 'iron-mountain': '#64777A' }

Tailwind — arbitrary

bg-[#64777A] text-[#64777A]

SCSS

$iron-mountain: #64777A;

Similar Colors

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#66797F · ΔE 2.0

Steep Cliff Gray

#6E7C7D · ΔE 3.1

Blue Spruce

#607077 · ΔE 3.7

Hamilton Blue

#5F767F · ΔE 3.8

Caribbean Teal

#627C7A · ΔE 4.3

Britannia Blue

#67737C · ΔE 4.7

Knoxville Gray

#5E6C6C · ΔE 4.8

Porch Swing

#707C79 · ΔE 4.9

Built by DSGN.HOUSE Updated 2026

Our color tools run on our own catalogue of 26,000+ real paint colors across 16 brands — Benjamin Moore, Sherwin-Williams, Behr, Dulux, RAL and more — with the color math (HSL and CIELAB matching) computed in-house, not scraped from summaries. Every color you pick maps to a real, buyable paint with its code, so what you see here you can actually take to the store. We review and update these tools and their data regularly.

Created by Denis Kataev, founder of DSGN.HOUSE — a software engineer and digital entrepreneur building professional color-design tools for everyone.

Frequently Asked Questions

What color is #64777A?

#64777A is Iron Mountain, a mid-tone grey with a cool undertone.

Is #64777A warm or cool?

Iron Mountain reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Iron Mountain?

Iron Mountain works well in living rooms, bedrooms, bathrooms. Designers typically use it for walls, soft furniture, hard surfaces.

What colors pair well with Iron Mountain?

Iron Mountain pairs naturally with white trim, natural wood, brass, soft black accents. Its complementary color is also a strong contrast option for accents.

Where can I download Iron Mountain?

You can download Iron Mountain on DSGN.HOUSE in 15 designer formats including CSS gradient, Figma, Procreate swatches, Tailwind config, Adobe ASE, SVG, and 4K wallpapers — all free.

What's the hex code for Iron Mountain?

The hex code is #64777A. In RGB it's 100, 119, 122, and in HSL it's 188°, 10%, 44%.

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