BLUES

Captain Blue

#005171

RGB 0, 81, 113 · HSL 197°, 100%, 22% · CMYK 100, 28, 0, 56

Captain Blue is #005171 in HEX — rgb(0, 81, 113), hsl(197°, 100%, 22%), cmyk(100%, 28%, 0%, 56%).

Captain Blue pulls into the deep end of the blues spectrum — HSL 197°, 100%, 22%. 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#005171
RGB0, 81, 113
HSL197°, 100%, 22%
HSV197°, 100%, 44%
CMYK100, 28, 0, 56
Decimal20849
CSS RGBrgb(0, 81, 113)
CSS HSLhsl(197, 100%, 22%)

Paint Matches — this color across 16 brands

Dulux

Pirate's Haven S33H9

ΔE 1.8 · #005576

Behr

Quiet Storm S-H-540

ΔE 3.8 · #135074

Hallman-Lindsay

Ocean Spray 662

ΔE 4 · #005379

Vista Paint

Ocean Spray C-661

ΔE 4.1 · #005177

Benjamin Moore

Caribbean 2059-20

ΔE 4.4 · #01577D

Sherwin-Williams

Regatta SW6517

ΔE 4.6 · #215772

PPG

Mountain Lake 1156-6

ΔE 6 · #2D5975

Dunn-Edwards

Navy Teal DE5832

ΔE 6.5 · #20576E

Valspar

Deep Sea Diving 5001-8C

ΔE 9.2 · #3B5B75

RAL

Azure Blue 5009

ΔE 9.4 · #025669

Kilz

Harborside RD120-02

ΔE 9.4 · #36637D

IKEA

IKEA122 122

ΔE 10 · #3A5170

Kobra

Blue 30

ΔE 10.7 · #195584

Dutch Boy

Delft Blue 7447

ΔE 14.3 · #003B67

Farrow & Ball

Stiffkey Blue 281

ΔE 16.7 · #4D5B6A

Colorhouse

Wool .06 Wool-06

ΔE 17.9 · #485761

Light Reflectance & Undertone

Light Reflectance Value (LRV)

7/100

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

#005171
#702000

Analogous

#007058
#005171
#001870

Triadic

#005171
#700050
#507000

Split-Complementary

#005171
#700018
#705800

Tetradic

#005171
#580070
#702000
#187000

Monochromatic

#00121A
#001A24
#005171
#0087BD
#0ABAFF

Rectangle

#005171
#200070
#702000
#507000

Compound

#005171
#001870
#702000
#705800

Variations

Lighter

#0089C0
#22B4ED
#89CFEA

Darker

#00405A
#002C3E
#001A24

Saturation

#273F49
#005070
#005070

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

8.69:1

AAA

Aa

vs Black

2.42:1

Fail

Deuteranopia

#005171
#344672

Original → Simulated

Protanopia

#005171
#4A4A6D

Original → Simulated

Tritanopia

#005171
#005651

Original → Simulated

Color Psychology

Focused · Cooling

Captain 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

#3F6970

Warm Bulb 2700K

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

#005171

Daylight 5500K

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

#2D6E94

Cool Bulb 6500K

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

Pairs With

#E7ECEE

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F8F8

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#561F0A

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

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: #005171;
CSS — background 
background-color: #005171;
CSS Variable 
--color-captain-blue: #005171;
Tailwind v3 — config 
colors: { 'captain-blue': '#005171' }
Tailwind — arbitrary 
bg-[#005171] text-[#005171]
SCSS 
$captain-blue: #005171;

Similar Colors

Caribbean Azure

#00567C · ΔE 4.3

Adriatic Sea

#004763 · ΔE 4.8

Mistral

#10557D · ΔE 5.8

Bermuda Blue

#185D82 · ΔE 5.9

Slate Teal

#18546A · ΔE 6.6

Champion Cobalt

#264864 · ΔE 7.5

Prussian Blue

#325A7D · ΔE 7.6

Blue Danube

#2D5970 · ΔE 7.6
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 #005171?

#005171 is Captain Blue, a deep blue with a cool undertone.

Is #005171 warm or cool?

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

What rooms work best with Captain Blue?

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

What colors pair well with Captain Blue?

Captain 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 Captain Blue?

You can download Captain 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 Captain Blue?

The hex code is #005171. In RGB it's 0, 81, 113, and in HSL it's 197°, 100%, 22%.

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