GREYS

Castle

#A3AEA6

RGB 163, 174, 166 · HSL 136°, 6%, 66% · CMYK 6, 0, 5, 32

Castle is #A3AEA6 in HEX — rgb(163, 174, 166), hsl(136°, 6%, 66%), cmyk(6%, 0%, 5%, 32%).

Castle pulls into the light end of the greys spectrum — HSL 136°, 6%, 66%. 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#A3AEA6

RGB163, 174, 166

HSL136°, 6%, 66%

HSV136°, 6%, 68%

CMYK6, 0, 5, 32

Decimal10727078

CSS RGBrgb(163, 174, 166)

CSS HSLhsl(136, 6%, 66%)

Paint Matches — this color across 16 brands

Benjamin Moore

Castle 1573

Exact match

Vista Paint

Artful Green K-868

ΔE 1.5 · #A0ADA3

PPG

Light Drizzle 1033-4

ΔE 1.6 · #A7AEA5

Hallman-Lindsay

Gaelic Garden 463

ΔE 2 · #A5B3AB

Sherwin-Williams

Halcyon Green SW6213

ΔE 2.3 · #9BAAA2

Colorhouse

Water .06 Water-06

ΔE 2.6 · #9EAEA3

Dunn-Edwards

Casting Shadow DE6291

ΔE 2.6 · #9DA7A0

Behr

Aged Jade HDC-CT-22

ΔE 2.6 · #9EB0A8

Kilz

Sage Pond RG260-01

ΔE 2.7 · #A6B5AC

Dulux

Grass Sands S23A3

ΔE 3.3 · #A2AEA0

Valspar

Coastal Jetty 5007-1C

ΔE 3.5 · #ADAFA7

Farrow & Ball

Dix Blue 82

ΔE 4.6 · #99B0AB

IKEA

IKEA181 181

ΔE 5.8 · #B2BCB8

Dutch Boy

Drifting Sand DCP-0218

ΔE 6.3 · #B6B2A9

RAL

White Aluminium 9006

ΔE 6.5 · #A5A5A5

Kobra

Silver 47

ΔE 13.7 · #CDCECD

Light Reflectance & Undertone

Light Reflectance Value (LRV)

41/100

Medium

0 · DarkLight · 100

Balanced reflectance — holds colour without washing out. Versatile for most rooms and the most forgiving range for true-to-chip results.

Undertone

TemperatureNeutral MasstoneGreen UndertoneBlue

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

Color Theory

Complementary

#A3AEA6

#AEA3AB

Analogous

#A6AEA3

#A3AEA6

#A3AEAB

Triadic

#A3AEA6

#A6A3AE

#AEA6A3

Split-Complementary

#A3AEA6

#ABA3AE

#AEA3A6

Tetradic

#A3AEA6

#A3A6AE

#AEA3AB

#AEABA3

Monochromatic

#566159

#7B8A7F

#A3AEA6

#CCD1CD

#F1F3F2

Rectangle

#A3AEA6

#A3ABAE

#AEA3AB

#AEA6A3

Compound

#A3AEA6

#A3AEAB

#AEA3AB

#AEA3A6

Variations

Lighter

#B5BEB8

#C8CECA

#DFE2E0

Darker

#7F8E83

#56635A

#323A34

Saturation

#A7AAA8

#A3AEA6

#7AD693

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

2.29:1

Fail

vs Black

9.16:1

AAA

Deuteranopia

#A3AEA6

#ABAAA7

Original → Simulated

Protanopia

#A3AEA6

#ACACA7

Original → Simulated

Tritanopia

#A3AEA6

#A4ADAD

Original → Simulated

Color Psychology

Quiet · Versatile

Castle 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

#BAAF98

Warm Bulb 2700K

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

#A3AEA6

Daylight 5500K

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

#A7B4BC

Cool Bulb 6500K

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

Pairs With

#EAEBEA

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.

#AB739C

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 · Trim · Soft furniture

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: #A3AEA6;

CSS — background

background-color: #A3AEA6;

CSS Variable

--color-castle: #A3AEA6;

Tailwind v3 — config

colors: { 'castle': '#A3AEA6' }

Tailwind — arbitrary

bg-[#A3AEA6] text-[#A3AEA6]

SCSS

$castle: #A3AEA6;

Similar Colors

Castle Walls

#A2ADA5 · ΔE 0.4

Pearl

#A7B0A9 · ΔE 1.3

Raindance

#A7B3AA · ΔE 1.9

Piedmont Gray

#9DA8A1 · ΔE 2.3

Mount Saint Anne

#A3B0AE · ΔE 3.4

Flora

#A3AC9E · ΔE 3.4

Sabre Gray

#A4A79E · ΔE 3.7

Silver Mink

#A7B2B0 · ΔE 3.7

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 #A3AEA6?

#A3AEA6 is Castle, a soft grey with a cool undertone.

Is #A3AEA6 warm or cool?

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

What rooms work best with Castle?

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

What colors pair well with Castle?

Castle 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 Castle?

You can download Castle 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 Castle?

The hex code is #A3AEA6. In RGB it's 163, 174, 166, and in HSL it's 136°, 6%, 66%.

← All colors