BLUES

Cetacean Blue

#001440

RGB 0, 20, 64 · HSL 221°, 100%, 13% · CMYK 100, 69, 0, 75

Cetacean Blue is #001440 in HEX — rgb(0, 20, 64), hsl(221°, 100%, 13%), cmyk(100%, 69%, 0%, 75%).

Cetacean Blue pulls into the deep end of the blues spectrum — HSL 221°, 100%, 13%. The saturated saturation makes it bold and immediate, 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#001440

RGB0, 20, 64

HSL221°, 100%, 13%

HSV221°, 100%, 25%

CMYK100, 69, 0, 75

Decimal5184

CSS RGBrgb(0, 20, 64)

CSS HSLhsl(221, 100%, 13%)

Paint Matches — this color across 16 brands

RAL

Ultramarine Blue 5002

ΔE 7.9 · #20214F

Behr

Soulful Music 600F-7

ΔE 14 · #1D315D

Dulux

Passionate Blue S41H9

ΔE 16.1 · #1F3665

Benjamin Moore

Admiral 2065-10

ΔE 17.4 · #2C3863

Dutch Boy

Royal Blue D-6740

ΔE 18.4 · #1D375C

Hallman-Lindsay

Newport Indigo historic-newport-indigo

ΔE 19.3 · #313D6C

Vista Paint

Hot Sauna C-1270

ΔE 20.1 · #3C3973

Sherwin-Williams

Dewberry SW6552

ΔE 20.8 · #3E385A

Kilz

Ruling Royalty TB-50

ΔE 21.2 · #313048

Dunn-Edwards

Magic Night DEA191

ΔE 21.8 · #3A3B5B

PPG

Daring Indigo 1166-7 · 13-25

ΔE 24.2 · #374874

Valspar

Spirit Blue 4011-9

ΔE 24.4 · #49456F

Kobra

Blue 31

ΔE 25.8 · #334059

Colorhouse

Petal .05 Petal-05

ΔE 28.1 · #1F4992

IKEA

IKEA122 122

ΔE 30.4 · #3A5170

Farrow & Ball

Pelt 254

ΔE 34.1 · #50414C

Light Reflectance & Undertone

Light Reflectance Value (LRV)

1/100

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

#001440

#422D00

Analogous

#003642

#001440

#0C0042

Triadic

#001440

#420015

#154200

Split-Complementary

#001440

#420C00

#364200

Tetradic

#001440

#420036

#422D00

#00420C

Monochromatic

#00081A

#001440

#002D8F

#0045DB

Rectangle

#001440

#2D0042

#422D00

#154200

Compound

#001440

#0C0042

#422D00

#364200

Variations

Lighter

#00319B

#1254E1

#7B9DE8

Darker

#001135

#000C24

#000715

Saturation

#171E2B

#001542

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

17.89:1

AAA

vs Black

1.17:1

Fail

Deuteranopia

#001440

#001740

Original → Simulated

Protanopia

#001440

#11113C

Original → Simulated

Tritanopia

#001440

#001F18

Original → Simulated

Color Psychology

Focused · Cooling

Cetacean 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

#3F3C4B

Warm Bulb 2700K

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

#001440

Daylight 5500K

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

#2D416F

Cool Bulb 6500K

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

Pairs With

#E7E9EE

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.

#533B09

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 / Aura Interior (for richer color depth in deep tones)

Recommended Finishes

Matte (walls) · Pearl (trim) · Satin (doors)

Deep colors look best in matte — gloss exaggerates surface flaws. Reserve subtle sheen for trim, doors, and high-touch areas.

Best Surfaces

Accent walls · Doors · Cabinetry · Built-ins

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

Tinted primer in a similar value is highly recommended — saves a coat and prevents the wall colour from washing the surface.

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: #001440;

CSS — background

background-color: #001440;

CSS Variable

--color-cetacean-blue: #001440;

Tailwind v3 — config

colors: { 'cetacean-blue': '#001440' }

Tailwind — arbitrary

bg-[#001440] text-[#001440]

SCSS

$cetacean-blue: #001440;

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#2B3762 · ΔE 17.0

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#333356 · ΔE 17.7

Bold Blue

#2B3558 · ΔE 18.0

Blue

#233872 · ΔE 18.0

Blue Grotto

#353963 · ΔE 18.4

Grape Gum

#413D6D · ΔE 20.7

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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 #001440?

#001440 is Cetacean Blue, a near-black blue with a cool undertone.

Is #001440 warm or cool?

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

What rooms work best with Cetacean Blue?

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

What colors pair well with Cetacean Blue?

Cetacean 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 Cetacean Blue?

You can download Cetacean 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 Cetacean Blue?

The hex code is #001440. In RGB it's 0, 20, 64, and in HSL it's 221°, 100%, 13%.

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