BLUES

Cobalt Blue

#1E213D

RGB 30, 33, 61 · HSL 234°, 34%, 18% · CMYK 51, 46, 0, 76

Cobalt Blue is #1E213D in HEX — rgb(30, 33, 61), hsl(234°, 34%, 18%), cmyk(51%, 46%, 0%, 76%).

Cobalt Blue pulls into the deep end of the blues spectrum — HSL 234°, 34%, 18%. 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#1E213D

RGB30, 33, 61

HSL234°, 34%, 18%

HSV234°, 51%, 24%

CMYK51, 46, 0, 76

Decimal1974589

CSS RGBrgb(30, 33, 61)

CSS HSLhsl(234, 34%, 18%)

Paint Matches — this color across 16 brands

RAL

Cobalt Blue 5013

Exact match

Dulux

Cheeky Toby S42F9

ΔE 7.2 · #283050

Kilz

Ruling Royalty TB-50

ΔE 8.1 · #313048

Benjamin Moore

Midnight 2067-10

ΔE 10.1 · #343457

Behr

Baritone 680F-7

ΔE 10.2 · #3C304F

Dutch Boy

Royal Blue D-6740

ΔE 12 · #1D375C

Dunn-Edwards

Magic Night DEA191

ΔE 12.3 · #3A3B5B

Sherwin-Williams

Dewberry SW6552

ΔE 12.3 · #3E385A

Vista Paint

Blazer Blue K-152

ΔE 13 · #243A52

PPG

Victory Blue 1165-7

ΔE 14.2 · #3A405A

Kobra

Blue 31

ΔE 14.4 · #334059

Hallman-Lindsay

Star-studded 620

ΔE 15.6 · #32425A

Valspar

Twilight Purple 4010-2

ΔE 17.3 · #3E3B46

IKEA

IKEA163 163

ΔE 17.6 · #423A45

Colorhouse

Nourish .06 Nourish-06

ΔE 21 · #313536

Farrow & Ball

Pelt 254

ΔE 21.1 · #50414C

Light Reflectance & Undertone

Light Reflectance Value (LRV)

2/100

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

#1E213D

#3E3A1E

Analogous

#1E313E

#1E213D

#2B1E3E

Triadic

#1E213D

#3E1E21

#213E1E

Split-Complementary

#1E213D

#3E2B1E

#313E1E

Tetradic

#1E213D

#3E1E31

#3E3A1E

#1E3E2B

Monochromatic

#080911

#1E213D

#383D71

#5159A4

Rectangle

#1E213D

#3A1E3E

#3E3A1E

#213E1E

Compound

#1E213D

#2B1E3E

#3E3A1E

#313E1E

Variations

Lighter

#3A4076

#5D65A6

#A4A8C7

Darker

#181A32

#101223

#090A14

Saturation

#292A33

#1E213E

#0F154D

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

15.67:1

AAA

vs Black

1.34:1

Fail

Deuteranopia

#1E213D

#19243D

Original → Simulated

Protanopia

#1E213D

#21213A

Original → Simulated

Tritanopia

#1E213D

#1A2723

Original → Simulated

Color Psychology

Focused · Cooling

Cobalt 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

#564549

Warm Bulb 2700K

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

#1E213D

Daylight 5500K

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

#434A6D

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.

#3B3921

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: #1E213D;

CSS — background

background-color: #1E213D;

CSS Variable

--color-cobalt-blue: #1E213D;

Tailwind v3 — config

colors: { 'cobalt-blue': '#1E213D' }

Tailwind — arbitrary

bg-[#1E213D] text-[#1E213D]

SCSS

$cobalt-blue: #1E213D;

Similar Colors

Midnight Navy

#333356 · ΔE 9.7

Bold Blue

#2B3558 · ΔE 9.9

Majestic Violet

#3A3450 · ΔE 10.1

Old Navy

#2E3549 · ΔE 11.1

Exotic Purple

#43334D · ΔE 12.6

Symphony Blue

#203B5D · ΔE 13.1

Deep Royal

#2F394B · ΔE 13.4

Admiral Blue

#2B3762 · ΔE 13.5

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 #1E213D?

#1E213D is Cobalt Blue, a near-black blue with a cool undertone.

Is #1E213D warm or cool?

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

What rooms work best with Cobalt Blue?

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

What colors pair well with Cobalt Blue?

Cobalt 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 Cobalt Blue?

You can download Cobalt 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 Cobalt Blue?

The hex code is #1E213D. In RGB it's 30, 33, 61, and in HSL it's 234°, 34%, 18%.

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