BLUES

Submarine Base

#5566AA

RGB 85, 102, 170 · HSL 228°, 33%, 50% · CMYK 50, 40, 0, 33

Submarine Base is #5566AA in HEX — rgb(85, 102, 170), hsl(228°, 33%, 50%), cmyk(50%, 40%, 0%, 33%).

Submarine Base pulls into the mid-tone end of the blues spectrum — HSL 228°, 33%, 50%. 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#5566AA

RGB85, 102, 170

HSL228°, 33%, 50%

HSV228°, 50%, 67%

CMYK50, 40, 0, 33

Decimal5596842

CSS RGBrgb(85, 102, 170)

CSS HSLhsl(228, 33%, 50%)

Paint Matches — this color across 16 brands

PPG

Blue Calico 1246-7

ΔE 1.5 · #5868AE

Dunn-Edwards

Bellflower DE5908

ΔE 2.3 · #5D66AA

Behr

Dangerously Elegant S540-6

ΔE 2.9 · #4B66AD

Vista Paint

Capri Isle C-604

ΔE 4.7 · #4E6EB2

Valspar

Twinkle Night 4004-8C

ΔE 4.8 · #5A65A1

Dulux

Prized Bloom S43H7

ΔE 5.1 · #6468A6

Hallman-Lindsay

Medieval 1263

ΔE 5.1 · #696DB0

Benjamin Moore

Mosaic CC-874

ΔE 6.8 · #3963A4

IKEA

IKEA128 128

ΔE 8.6 · #4A72B0

Dutch Boy

Blue Sea VS-9451

ΔE 8.6 · #2D61AD

Kobra

Violet 25

ΔE 9.7 · #776BAB

Kilz

Grape Beginnings RB130-02

ΔE 10.1 · #586194

Sherwin-Williams

Gentian SW6817

ΔE 11.5 · #6572A5

RAL

Sky Blue 5015

ΔE 13.1 · #2271B3

Colorhouse

Petal .05 Petal-05

ΔE 13.9 · #1F4992

Farrow & Ball

Pitch Blue 220

ΔE 21.2 · #636E8F

Light Reflectance & Undertone

Light Reflectance Value (LRV)

14/100

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

#5566AA

#AA9955

Analogous

#5590AA

#5566AA

#6F55AA

Triadic

#5566AA

#AA5566

#66AA55

Split-Complementary

#5566AA

#AA6F55

#90AA55

Tetradic

#5566AA

#AA5590

#AA9955

#55AA6F

Monochromatic

#222944

#3C4877

#5566AA

#8894C3

#BBC2DD

Rectangle

#5566AA

#9955AA

#AA9955

#66AA55

Compound

#5566AA

#6F55AA

#AA9955

#90AA55

Variations

Lighter

#7785BB

#9DA6C8

#C8CCDD

Darker

#435189

#2D3760

#192038

Saturation

#73788C

#5566AA

#2B4DD4

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

5.43:1

vs Black

3.87:1

AA Large

Deuteranopia

#5566AA

#4D6AAA

Original → Simulated

Protanopia

#5566AA

#6363A3

Original → Simulated

Tritanopia

#5566AA

#4B746B

Original → Simulated

Color Psychology

Focused · Cooling

Submarine Base 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

#7F799B

Warm Bulb 2700K

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

#5566AA

Daylight 5500K

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

#6C7EBF

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.

#8B7F4E

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 · Trim · Soft furniture

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: #5566AA;

CSS — background

background-color: #5566AA;

CSS Variable

--color-submarine-base: #5566AA;

Tailwind v3 — config

colors: { 'submarine-base': '#5566AA' }

Tailwind — arbitrary

bg-[#5566AA] text-[#5566AA]

SCSS

$submarine-base: #5566AA;

Similar Colors

Mosaic

#3862A3 · ΔE 6.9

Twilight Blue

#365496 · ΔE 8.5

Southern Belle

#41548C · ΔE 10.1

Scandinavian Blue

#4E4E8C · ΔE 10.4

Waterdrop

#5C79B3 · ΔE 10.5

Bistro Blue

#53588A · ΔE 11.7

Delphinium

#304C89 · ΔE 12.0

Big Country Blue

#0066B1 · ΔE 12.1

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 #5566AA?

#5566AA is Submarine Base, a mid-tone blue with a cool undertone.

Is #5566AA warm or cool?

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

What rooms work best with Submarine Base?

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

What colors pair well with Submarine Base?

Submarine Base 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 Submarine Base?

You can download Submarine Base 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 Submarine Base?

The hex code is #5566AA. In RGB it's 85, 102, 170, and in HSL it's 228°, 33%, 50%.

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