BLUES

North Star Blue

#223399

RGB 34, 51, 153 · HSL 231°, 64%, 37% · CMYK 78, 67, 0, 40

North Star Blue is #223399 in HEX — rgb(34, 51, 153), hsl(231°, 64%, 37%), cmyk(78%, 67%, 0%, 40%).

North Star Blue pulls into the rich end of the blues spectrum — HSL 231°, 64%, 37%. The balanced saturation makes it confident without overpowering, 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#223399

RGB34, 51, 153

HSL231°, 64%, 37%

HSV231°, 78%, 60%

CMYK78, 67, 0, 40

Decimal2241433

CSS RGBrgb(34, 51, 153)

CSS HSLhsl(231, 64%, 37%)

Paint Matches — this color across 16 brands

Behr

Navy Blue S-H-580

ΔE 2.9 · #0B2F97

Dutch Boy

Blue Royale VS-9550

ΔE 15.1 · #243F90

RAL

Signal Blue 5005

ΔE 22.8 · #1E2D6E

Colorhouse

Petal .05 Petal-05

ΔE 22.9 · #1F4992

Vista Paint

Blue Highlight C-612

ΔE 25.1 · #334688

PPG

Crushed Velvet 1245-7

ΔE 26.6 · #445397

Hallman-Lindsay

Blue Highlight 613

ΔE 26.7 · #324A8B

Dunn-Edwards

Beaded Blue DE5909

ΔE 28.2 · #494D8B

Benjamin Moore

Evening 2066-20

ΔE 28.2 · #014F94

Dulux

Brilliant Purple SB8G8

ΔE 28.6 · #4D4985

Valspar

Homecoming Blue 4009-9

ΔE 33.6 · #484E83

Sherwin-Williams

Morning Glory SW6971

ΔE 34.4 · #3C4C80

Kilz

Superstition RH250

ΔE 34.9 · #604C7F

Kobra

Violet 25

ΔE 35.1 · #776BAB

IKEA

IKEA128 128

ΔE 39.1 · #4A72B0

Farrow & Ball

Pitch Blue 220

ΔE 50.8 · #636E8F

Light Reflectance & Undertone

Light Reflectance Value (LRV)

5/100

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

#223399

#9B8922

Analogous

#22709B

#223399

#4C229B

Triadic

#223399

#9B2234

#349B22

Split-Complementary

#223399

#9B4C22

#709B22

Tetradic

#223399

#9B2270

#9B8922

#229B4C

Monochromatic

#060A1D

#141F5C

#223399

#364ED3

#7585E1

Rectangle

#223399

#89229B

#9B8922

#349B22

Compound

#223399

#4C229B

#9B8922

#709B22

Variations

Lighter

#2E46CF

#6A7AD3

#AEB5E0

Darker

#19287E

#0F1A58

#080F34

Saturation

#4C5270

#22349B

#1128AC

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

10.49:1

AAA

vs Black

2.00:1

Fail

Deuteranopia

#223399

#004199

Original → Simulated

Protanopia

#223399

#313191

Original → Simulated

Tritanopia

#223399

#004F3F

Original → Simulated

Color Psychology

Focused · Cooling

North Star Blue 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

#59538E

Warm Bulb 2700K

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

#223399

Daylight 5500K

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

#4658B2

Cool Bulb 6500K

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

Pairs With

#E8E9ED

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.

#7C6F25

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: #223399;

CSS — background

background-color: #223399;

CSS Variable

--color-north-star-blue: #223399;

Tailwind v3 — config

colors: { 'north-star-blue': '#223399' }

Tailwind — arbitrary

bg-[#223399] text-[#223399]

SCSS

$north-star-blue: #223399;

Similar Colors

Warriors Blue

#00498D · ΔE 27.1

Evening Blue

#004E93 · ΔE 27.9

Blue

#233872 · ΔE 28.3

Scandinavian Blue

#4E4E8C · ΔE 28.4

Twilight Blue

#365496 · ΔE 28.7

Delphinium

#304C89 · ΔE 29.7

Basic Blue

#3F457D · ΔE 30.4

Mystical Grape

#664B86 · ΔE 31.1

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 #223399?

#223399 is North Star Blue, a deep blue with a cool undertone.

Is #223399 warm or cool?

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

What rooms work best with North Star Blue?

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

What colors pair well with North Star Blue?

North Star Blue 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 North Star Blue?

You can download North Star Blue 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 North Star Blue?

The hex code is #223399. In RGB it's 34, 51, 153, and in HSL it's 231°, 64%, 37%.

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