BLUES

Blue Flag

#3B526F

RGB 59, 82, 111 · HSL 213°, 31%, 33% · CMYK 47, 26, 0, 56

Blue Flag is #3B526F in HEX — rgb(59, 82, 111), hsl(213°, 31%, 33%), cmyk(47%, 26%, 0%, 56%).

Blue Flag pulls into the rich end of the blues spectrum — HSL 213°, 31%, 33%. The muted saturation makes it quiet but present, and the hue reads cool. In interior projects it shines on bedrooms, bathrooms, home offices — for calm, focused environments. Reads best alongside warm white trim, oak or walnut, brass or matte black hardware.

Color Codes

HEX#3B526F

RGB59, 82, 111

HSL213°, 31%, 33%

HSV213°, 47%, 44%

CMYK47, 26, 0, 56

Decimal3887727

CSS RGBrgb(59, 82, 111)

CSS HSLhsl(213, 31%, 33%)

Paint Matches — this color across 16 brands

Dulux

Blue Flag S38F8

Exact match

IKEA

IKEA122 122

ΔE 1.4 · #3A5170

Behr

Champlain Blue HDC-CL-26

ΔE 2.1 · #425573

Benjamin Moore

New 805

ΔE 2.6 · #365574

Kilz

Blue Uniform RC130-02

ΔE 2.6 · #3B4F6F

Dunn-Edwards

Blue Earth DE5853

ΔE 2.7 · #375673

Vista Paint

Happy Tune C-647

ΔE 3.3 · #315472

Valspar

Indigo Cloth 4009-7

ΔE 3.4 · #3D5872

PPG

Annapolis Blue 1164-7

ΔE 3.5 · #384A66

Hallman-Lindsay

Quiet Peace 592

ΔE 4 · #3A4A64

Sherwin-Williams

Indigo Batik SW7602

ΔE 6.4 · #3E5063

Kobra

Blue 31

ΔE 8.1 · #334059

Farrow & Ball

Stiffkey Blue 281

ΔE 9.9 · #4D5B6A

RAL

Brillant Blue 5007

ΔE 9.9 · #3E5F8A

Colorhouse

Wool .06 Wool-06

ΔE 12.2 · #485761

Dutch Boy

Royal Blue D-6740

ΔE 13.2 · #1D375C

Light Reflectance & Undertone

Light Reflectance Value (LRV)

8/100

Very Dark

0 · DarkLight · 100

Absorbs almost all light — dramatic and cocooning. Needs strong artificial lighting and works best as an accent or in well-lit rooms.

Undertone

TemperatureCool MasstoneBlue UndertoneViolet

Reads as a cool blue with a violet undertone showing through, especially in daylight. Pair trim and adjacent colours to either calm or amplify that undertone.

Color Theory

Complementary

#3B526F

#6E573A

Analogous

#3A6C6E

#3B526F

#3D3A6E

Triadic

#3B526F

#6E3A52

#526E3A

Split-Complementary

#3B526F

#6E3D3A

#6C6E3A

Tetradic

#3B526F

#6E3A6C

#6E573A

#3A6E3D

Monochromatic

#090C11

#202C3C

#3B526F

#5477A0

#839EBE

Rectangle

#3B526F

#573A6E

#6E573A

#526E3A

Compound

#3B526F

#3D3A6E

#6E573A

#6C6E3A

Variations

Lighter

#52739B

#7D96B4

#B6C2D0

Darker

#2D4159

#1F2D3E

#111A25

Saturation

#4C535C

#3A526E

#1D4F8B

Interior Use

Best Rooms

bedrooms, bathrooms, home offices

Best Uses

main walls, ceilings, trim, cabinetry

Pairs With

warm white trim, oak or walnut, brass or matte black hardware

Accessibility (WCAG)

vs White

8.01:1

AAA

vs Black

2.62:1

Fail

Deuteranopia

#3B526F

#434F70

Original → Simulated

Protanopia

#3B526F

#4F4F6C

Original → Simulated

Tritanopia

#3B526F

#385753

Original → Simulated

Color Psychology

Focused · Cooling

Blue Flag lowers the temperature of a room — useful in south-facing rooms that overheat visually, and in home offices where you want a clear head. Pair with warm wood and brass to keep it from reading clinical.

SymbolismTrust, depth, stability

PersonalityClear-headed, dependable, contemplative

focustrustcalmofficebedroomdepth

How it looks under different light

#6C6A6E

Warm Bulb 2700K

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

#3B526F

Daylight 5500K

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

#596F93

Cool Bulb 6500K

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

Pairs With

#E9EAEC

Trim

Matched off-white

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

#F7F7F8

Ceiling

Whisper tint

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

#5A4935

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: #3B526F;

CSS — background

background-color: #3B526F;

CSS Variable

--color-blue-flag: #3B526F;

Tailwind v3 — config

colors: { 'blue-flag': '#3B526F' }

Tailwind — arbitrary

bg-[#3B526F] text-[#3B526F]

SCSS

$blue-flag: #3B526F;

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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 #3B526F?

#3B526F is Blue Flag, a deep blue with a cool undertone.

Is #3B526F warm or cool?

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

What rooms work best with Blue Flag?

Blue Flag works well in bedrooms, bathrooms, home offices. Designers typically use it for main walls, ceilings, trim, cabinetry.

What colors pair well with Blue Flag?

Blue Flag pairs naturally with warm white trim, oak or walnut, brass or matte black hardware. Its complementary color is also a strong contrast option for accents.

Where can I download Blue Flag?

You can download Blue Flag 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 Blue Flag?

The hex code is #3B526F. In RGB it's 59, 82, 111, and in HSL it's 213°, 31%, 33%.

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