GREYS

Noctis

#646C77

RGB 100, 108, 119 · HSL 215°, 9%, 43% · CMYK 16, 9, 0, 53

Noctis is #646C77 in HEX — rgb(100, 108, 119), hsl(215°, 9%, 43%), cmyk(16%, 9%, 0%, 53%).

Noctis pulls into the rich end of the greys spectrum — HSL 215°, 9%, 43%. 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#646C77

RGB100, 108, 119

HSL215°, 9%, 43%

HSV215°, 16%, 47%

CMYK16, 9, 0, 53

Decimal6581367

CSS RGBrgb(100, 108, 119)

CSS HSLhsl(215, 9%, 43%)

Paint Matches — this color across 16 brands

Dulux

Noctis S40A5

Exact match

Sherwin-Williams

Granite Peak SW6250

ΔE 1.5 · #606B75

Vista Paint

Romantic Mood K-794

ΔE 1.6 · #646F79

Valspar

Smoky Pitch 4007-4B

ΔE 2.3 · #606E79

Hallman-Lindsay

Backwater 513

ΔE 2.4 · #687078

PPG

Alley Cat 1043-6

ΔE 2.4 · #656874

IKEA

IKEA156 156

ΔE 2.5 · #676973

Dunn-Edwards

Draw Your Sword DE6348

ΔE 3 · #6C7179

Benjamin Moore

Britannia 1623

ΔE 3.5 · #68747D

Behr

Enigmatic BNC-30

ΔE 3.8 · #6D6F7E

Kilz

Murky Depths RM140

ΔE 4.2 · #5F676C

Farrow & Ball

Inchyra Blue 289

ΔE 7.3 · #586768

Dutch Boy

Ocean Blue D-6743

ΔE 8.3 · #4C6A74

Colorhouse

Wool .06 Wool-06

ΔE 9.6 · #485761

RAL

Platinum Grey 7036

ΔE 9.7 · #7F7679

Kobra

Grey 42

ΔE 14.2 · #889099

Light Reflectance & Undertone

Light Reflectance Value (LRV)

15/100

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 MasstoneBlue UndertoneViolet

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

Color Theory

Complementary

#646C77

#786F64

Analogous

#647678

#646C77

#656478

Triadic

#646C77

#78646C

#6C7864

Split-Complementary

#646C77

#786564

#767864

Tetradic

#646C77

#786476

#786F64

#647865

Monochromatic

#1E2124

#41464E

#646C77

#8A929E

#B4B9C0

Rectangle

#646C77

#6F6478

#786F64

#6C7864

Compound

#646C77

#656478

#786F64

#767864

Variations

Lighter

#808995

#A1A7AE

#C9CCCF

Darker

#4F5660

#363B42

#1F2227

Saturation

#6B6D71

#646C78

#3264A9

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

5.31:1

vs Black

3.95:1

AA Large

Deuteranopia

#646C77

#676A78

Original → Simulated

Protanopia

#646C77

#6B6B76

Original → Simulated

Tritanopia

#646C77

#636E6C

Original → Simulated

Color Psychology

Quiet · Versatile

Noctis 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

#8A7E74

Warm Bulb 2700K

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

#646C77

Daylight 5500K

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

#788399

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.

#756146

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: #646C77;

CSS — background

background-color: #646C77;

CSS Variable

--color-noctis: #646C77;

Tailwind v3 — config

colors: { 'noctis': '#646C77' }

Tailwind — arbitrary

bg-[#646C77] text-[#646C77]

SCSS

$noctis: #646C77;

Similar Colors

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#67737C · ΔE 3.2

Ashland Slate

#696D72 · ΔE 3.9

Ocean Floor

#5F666C · ΔE 3.9

Andes Summit

#586471 · ΔE 4.0

Blue Spruce

#607077 · ΔE 4.1

Powell Gray

#5A656C · ΔE 4.2

Gray Shower

#6D7378 · ΔE 4.6

Amethyst Shadow

#6E7182 · ΔE 4.8

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 #646C77?

#646C77 is Noctis, a mid-tone grey with a cool undertone.

Is #646C77 warm or cool?

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

What rooms work best with Noctis?

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

What colors pair well with Noctis?

Noctis 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 Noctis?

You can download Noctis 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 Noctis?

The hex code is #646C77. In RGB it's 100, 108, 119, and in HSL it's 215°, 9%, 43%.

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