BLUES

Blue

#243973

RGB 36, 57, 115 · HSL 224°, 52%, 30% · CMYK 69, 50, 0, 55

Blue is #243973 in HEX — rgb(36, 57, 115), hsl(224°, 52%, 30%), cmyk(69%, 50%, 0%, 55%).

Blue pulls into the rich end of the blues spectrum — HSL 224°, 52%, 30%. 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#243973
RGB36, 57, 115
HSL224°, 52%, 30%
HSV224°, 69%, 45%
CMYK69, 50, 0, 55
Decimal2374003
CSS RGBrgb(36, 57, 115)
CSS HSLhsl(224, 52%, 30%)

Paint Matches — this color across 16 brands

Benjamin Moore

Blue 2066-10

Exact match

Behr

Night Watch 610D-7

ΔE 2.3 · #1E346D

Vista Paint

Frozen Blue C-605

ΔE 3.9 · #353C77

Hallman-Lindsay

Frozen Blue 606

ΔE 4.1 · #354079

RAL

Traffic Blue 5017

ΔE 4.8 · #063971

Dunn-Edwards

Indigo Night DEA138

ΔE 5.7 · #324680

Dulux

Passionate Blue S41H9

ΔE 7.4 · #1F3665

Sherwin-Williams

Morning Glory SW6971

ΔE 9.6 · #3C4C80

PPG

Brilliant Blue 1161-7

ΔE 10.4 · #234E86

Colorhouse

Petal .05 Petal-05

ΔE 10.8 · #1F4992

Valspar

Homecoming Blue 4009-9

ΔE 11 · #484E83

Dutch Boy

Delft Blue 7447

ΔE 12.3 · #003B67

Kilz

Indigo RH220

ΔE 13.4 · #314973

Kobra

Blue 30

ΔE 17.2 · #195584

IKEA

IKEA122 122

ΔE 21.3 · #3A5170

Farrow & Ball

Pitch Blue 220

ΔE 28.3 · #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

#243973
#745F25

Analogous

#256274
#243973
#372574

Triadic

#243973
#74253A
#3A7425

Split-Complementary

#243973
#743725
#627425

Tetradic

#243973
#742562
#745F25
#257437

Monochromatic

#060A13
#121D3A
#243973
#3757AE
#6480CE

Rectangle

#243973
#5F2574
#745F25
#3A7425

Compound

#243973
#372574
#745F25
#627425

Variations

Lighter

#3655AB
#657EC3
#AAB6D7

Darker

#1C2E5F
#121F42
#0A1227

Saturation

#414758
#253A74
#123187

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)

Aa

vs White

11.01:1

AAA

Aa

vs Black

1.91:1

Fail

Deuteranopia

#243973
#1C3C73

Original → Simulated

Protanopia

#243973
#36366E

Original → Simulated

Tritanopia

#243973
#16463D

Original → Simulated

Color Psychology

Focused · Cooling

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

#5A5771

Warm Bulb 2700K

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

#243973

Daylight 5500K

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

#485C96

Cool Bulb 6500K

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

Pairs With

#E9EAED

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.

#5E4E24

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

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: #243973;
CSS — background 
background-color: #243973;
CSS Variable 
--color-blue: #243973;
Tailwind v3 — config 
colors: { 'blue': '#243973' }
Tailwind — arbitrary 
bg-[#243973] text-[#243973]
SCSS 
$blue: #243973;

Similar Colors

Blue

#233872 · ΔE 0.4

Starry Night Blue

#334076 · ΔE 4.6

Basic Blue

#3F457D · ΔE 7.0

Delphinium

#304C89 · ΔE 8.2

Grape Gum

#413D6D · ΔE 9.3

Dark Royal Blue

#144B86 · ΔE 9.5

Admiral Blue

#2B3762 · ΔE 9.7

Warriors Blue

#00498D · ΔE 9.9
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 #243973?

#243973 is Blue, a deep blue with a cool undertone.

Is #243973 warm or cool?

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

What rooms work best with Blue?

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

What colors pair well with Blue?

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 Blue?

You can download 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 Blue?

The hex code is #243973. In RGB it's 36, 57, 115, and in HSL it's 224°, 52%, 30%.

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