BLUES

Restless Sea

#37515E

RGB 55, 81, 94 · HSL 200°, 26%, 29% · CMYK 41, 14, 0, 63

Restless Sea is #37515E in HEX — rgb(55, 81, 94), hsl(200°, 26%, 29%), cmyk(41%, 14%, 0%, 63%).

Restless Sea pulls into the deep end of the blues spectrum — HSL 200°, 26%, 29%. 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#37515E

RGB55, 81, 94

HSL200°, 26%, 29%

HSV200°, 41%, 37%

CMYK41, 14, 0, 63

Decimal3625310

CSS RGBrgb(55, 81, 94)

CSS HSLhsl(200, 26%, 29%)

Paint Matches — this color across 16 brands

Behr

Restless Sea PPU13-20

Exact match

Dulux

Sailing Safari S35B7

ΔE 1.6 · #395160

Hallman-Lindsay

Day Spa 634

ΔE 2.3 · #3D5463

Sherwin-Williams

Seaworthy SW7620

ΔE 2.4 · #314D58

PPG

Sailor's Coat 1153-7

ΔE 2.5 · #334B58

Vista Paint

Day Spa C-633

ΔE 2.7 · #3E5261

Dunn-Edwards

Slate Wall DE5797

ΔE 3.1 · #40535D

Valspar

Boisterous Blue 4009-6

ΔE 3.2 · #375264

Benjamin Moore

In 1666

ΔE 3.3 · #425764

Farrow & Ball

Hague Blue 30

ΔE 3.8 · #3D4E57

Colorhouse

Wool .06 Wool-06

ΔE 5.2 · #485761

Kilz

Kettle Black RE120-02

ΔE 5.5 · #47535C

RAL

Slate Grey 7015

ΔE 8.6 · #434750

IKEA

IKEA152 152

ΔE 10.1 · #494F50

Dutch Boy

Ocean Blue D-6743

ΔE 10.4 · #4C6A74

Kobra

Blue 31

ΔE 11.6 · #334059

Light Reflectance & Undertone

Light Reflectance Value (LRV)

8/100

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

#37515E

#5D4437

Analogous

#375D57

#37515E

#373D5D

Triadic

#37515E

#5D3750

#505D37

Split-Complementary

#37515E

#5D373D

#5D5737

Tetradic

#37515E

#57375D

#5D4437

#3D5D37

Monochromatic

#090E10

#1A272D

#37515E

#537A8D

#7BA0B2

Rectangle

#37515E

#44375D

#5D4437

#505D37

Compound

#37515E

#373D5D

#5D4437

#5D5737

Variations

Lighter

#52788B

#7A9AAA

#B4C3CB

Darker

#2B414B

#1D2D34

#111A1F

Saturation

#444C50

#37505D

#1B5979

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

8.40:1

AAA

vs Black

2.50:1

Fail

Deuteranopia

#37515E

#454B5F

Original → Simulated

Protanopia

#37515E

#4D4D5C

Original → Simulated

Tritanopia

#37515E

#365351

Original → Simulated

Color Psychology

Focused · Cooling

Restless Sea 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

#696962

Warm Bulb 2700K

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

#37515E

Daylight 5500K

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

#566E86

Cool Bulb 6500K

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

Pairs With

#EAEBEC

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.

#4F3A2F

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: #37515E;

CSS — background

background-color: #37515E;

CSS Variable

--color-restless-sea: #37515E;

Tailwind v3 — config

colors: { 'restless-sea': '#37515E' }

Tailwind — arbitrary

bg-[#37515E] text-[#37515E]

SCSS

$restless-sea: #37515E;

Similar Colors

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#415663 · ΔE 2.9

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#445962 · ΔE 4.6

Brush Blue

#414F57 · ΔE 4.9

Washington Blue

#304656 · ΔE 5.1

Everard Blue

#3D5459 · ΔE 5.3

Newburyport Blue

#465566 · ΔE 5.4

Hudson Bay

#3F5266 · ΔE 5.5

Summer Nights

#34586C · ΔE 5.5

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 #37515E?

#37515E is Restless Sea, a deep blue with a cool undertone.

Is #37515E warm or cool?

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

What rooms work best with Restless Sea?

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

What colors pair well with Restless Sea?

Restless Sea 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 Restless Sea?

You can download Restless Sea 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 Restless Sea?

The hex code is #37515E. In RGB it's 55, 81, 94, and in HSL it's 200°, 26%, 29%.

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