BLUES

Cerulean Blue

#2A52BE

RGB 42, 82, 190 · HSL 224°, 64%, 45% · CMYK 78, 57, 0, 25

Cerulean Blue is #2A52BE in HEX — rgb(42, 82, 190), hsl(224°, 64%, 45%), cmyk(78%, 57%, 0%, 25%).

Cerulean Blue pulls into the mid-tone end of the blues spectrum — HSL 224°, 64%, 45%. 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#2A52BE

RGB42, 82, 190

HSL224°, 64%, 45%

HSV224°, 78%, 75%

CMYK78, 57, 0, 25

Decimal2773694

CSS RGBrgb(42, 82, 190)

CSS HSLhsl(224, 64%, 45%)

Paint Matches — this color across 16 brands

Behr

Running Water S-G-580

ΔE 4.3 · #1A5ACA

Dutch Boy

Blue Royale VS-9550

ΔE 16.7 · #243F90

Colorhouse

Petal .05 Petal-05

ΔE 21.4 · #1F4992

PPG

Crushed Velvet 1245-7

ΔE 24 · #445397

Vista Paint

Cascade Twilight K-128

ΔE 24.5 · #224B8F

Benjamin Moore

Evening 2066-20

ΔE 25.3 · #014F94

Hallman-Lindsay

Blue Highlight 613

ΔE 25.8 · #324A8B

Dunn-Edwards

Bellflower DE5908

ΔE 26.3 · #5D66AA

Dulux

Blue Sail S40H8 · SB8E7

ΔE 27.1 · #24589A

RAL

Signal Blue 5005

ΔE 28.2 · #1E2D6E

Kobra

Violet 25

ΔE 30.6 · #776BAB

Valspar

Twinkle Night 4004-8C

ΔE 30.6 · #5A65A1

IKEA

IKEA128 128

ΔE 32.5 · #4A72B0

Sherwin-Williams

Morning Glory SW6971

ΔE 33.7 · #3C4C80

Kilz

Sapphire Sequin RB120-02

ΔE 33.9 · #4B568A

Farrow & Ball

Pitch Blue 220

ΔE 47.3 · #636E8F

Light Reflectance & Undertone

Light Reflectance Value (LRV)

10/100

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

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

#2A52BE

#BC9529

Analogous

#299ABC

#2A52BE

#4C29BC

Triadic

#2A52BE

#BC2950

#50BC29

Split-Complementary

#2A52BE

#BC4C29

#9ABC29

Tetradic

#2A52BE

#BC299A

#BC9529

#29BC4C

Monochromatic

#0E1B3F

#1C367D

#2A52BE

#587BDA

#96ACE8

Rectangle

#2A52BE

#9529BC

#BC9529

#50BC29

Compound

#2A52BE

#4C29BC

#BC9529

#9ABC29

Variations

Lighter

#476DD7

#7D95D9

#B8C4E4

Darker

#1E3F99

#132A6C

#0A1840

Saturation

#5D6889

#2950BC

#1547D1

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

6.89:1

vs Black

3.05:1

AA Large

Deuteranopia

#2A52BE

#005ABE

Original → Simulated

Protanopia

#2A52BE

#4D4DB4

Original → Simulated

Tritanopia

#2A52BE

#006D5C

Original → Simulated

Color Psychology

Focused · Cooling

Cerulean 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

#5F6AAA

Warm Bulb 2700K

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

#2A52BE

Daylight 5500K

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

#4C6FCE

Cool Bulb 6500K

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

Pairs With

#E8EAED

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.

#977A2C

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: #2A52BE;

CSS — background

background-color: #2A52BE;

CSS Variable

--color-cerulean-blue: #2A52BE;

Tailwind v3 — config

colors: { 'cerulean-blue': '#2A52BE' }

Tailwind — arbitrary

bg-[#2A52BE] text-[#2A52BE]

SCSS

$cerulean-blue: #2A52BE;

Similar Colors

Evening Blue

#004E93 · ΔE 25.2

Warriors Blue

#00498D · ΔE 25.5

Big Country Blue

#0066B1 · ΔE 25.6

Twilight Blue

#365496 · ΔE 25.7

Scandinavian Blue

#4E4E8C · ΔE 27.6

Mosaic

#3862A3 · ΔE 28.4

Delphinium

#304C89 · ΔE 28.4

Brilliant Blue

#0063A6 · ΔE 29.8

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 #2A52BE?

#2A52BE is Cerulean Blue, a mid-tone blue with a cool undertone.

Is #2A52BE warm or cool?

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

What rooms work best with Cerulean Blue?

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

What colors pair well with Cerulean Blue?

Cerulean 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 Cerulean Blue?

You can download Cerulean 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 Cerulean Blue?

The hex code is #2A52BE. In RGB it's 42, 82, 190, and in HSL it's 224°, 64%, 45%.

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