BLUES

Sea Kelp

#354A55

RGB 53, 74, 85 · HSL 201°, 23%, 27% · CMYK 38, 13, 0, 67

Sea Kelp is #354A55 in HEX — rgb(53, 74, 85), hsl(201°, 23%, 27%), cmyk(38%, 13%, 0%, 67%).

Sea Kelp pulls into the deep end of the blues spectrum — HSL 201°, 23%, 27%. 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#354A55

RGB53, 74, 85

HSL201°, 23%, 27%

HSV201°, 38%, 33%

CMYK38, 13, 0, 67

Decimal3492437

CSS RGBrgb(53, 74, 85)

CSS HSLhsl(201, 23%, 27%)

Paint Matches — this color across 16 brands

Dulux

Sea Kelp S34A8

ΔE 0.7 · #354A54

PPG

Sailor's Coat 1153-7

ΔE 1.5 · #334B58

Behr

Nocturne Blue HDC-CL-28

ΔE 1.8 · #334C59

Sherwin-Williams

Seaworthy SW7620

ΔE 2.5 · #314D58

Farrow & Ball

Hague Blue 30

ΔE 2.7 · #3D4E57

Valspar

Everglade Deck 5011-3

ΔE 3.2 · #3C5058

Benjamin Moore

Washington CW-630

ΔE 3.5 · #314757

Dunn-Edwards

Slate Wall DE5797

ΔE 4.1 · #40535D

Vista Paint

Day Spa C-633

ΔE 4.4 · #3E5261

Hallman-Lindsay

Calm Interlude 501

ΔE 4.8 · #3C4D51

Kilz

Prussian Blue RD100-02

ΔE 5.2 · #444D5A

Colorhouse

Wool .06 Wool-06

ΔE 6.3 · #485761

RAL

Slate Grey 7015

ΔE 6.4 · #434750

IKEA

IKEA152 152

ΔE 8.7 · #494F50

Kobra

Blue 31

ΔE 10.8 · #334059

Dutch Boy

Seal of Grey VS-9301

ΔE 12.4 · #575757

Light Reflectance & Undertone

Light Reflectance Value (LRV)

6/100

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

#354A55

#554035

Analogous

#355550

#354A55

#353A55

Triadic

#354A55

#55354A

#4A5535

Split-Complementary

#354A55

#55353A

#555035

Tetradic

#354A55

#503555

#554035

#3A5535

Monochromatic

#0A0E10

#182126

#354A55

#527284

#7899AB

Rectangle

#354A55

#403555

#554035

#4A5535

Compound

#354A55

#353A55

#554035

#555035

Variations

Lighter

#527182

#7996A5

#B3C1C8

Darker

#2A3B44

#1C292F

#10181C

Saturation

#40464A

#354A55

#1B526F

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

9.28:1

AAA

vs Black

2.26:1

Fail

Deuteranopia

#354A55

#404556

Original → Simulated

Protanopia

#354A55

#474754

Original → Simulated

Tritanopia

#354A55

#344C4A

Original → Simulated

Color Psychology

Focused · Cooling

Sea Kelp 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

#67645B

Warm Bulb 2700K

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

#354A55

Daylight 5500K

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

#54697F

Cool Bulb 6500K

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

Pairs With

#EAEBEB

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.

#49362C

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: #354A55;

CSS — background

background-color: #354A55;

CSS Variable

--color-sea-kelp: #354A55;

Tailwind v3 — config

colors: { 'sea-kelp': '#354A55' }

Tailwind — arbitrary

bg-[#354A55] text-[#354A55]

SCSS

$sea-kelp: #354A55;

Similar Colors

Washington Blue

#304656 · ΔE 3.7

Blue Note

#404B54 · ΔE 3.9

Brush Blue

#414F57 · ΔE 4.0

Hale Navy

#434B56 · ΔE 5.0

River Blue

#254952 · ΔE 5.3

In the Midnight Hour

#415663 · ΔE 5.3

Twilight

#254455 · ΔE 5.5

Everard Blue

#3D5459 · ΔE 5.7

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 #354A55?

#354A55 is Sea Kelp, a deep blue with a cool undertone.

Is #354A55 warm or cool?

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

What rooms work best with Sea Kelp?

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

What colors pair well with Sea Kelp?

Sea Kelp 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 Sea Kelp?

You can download Sea Kelp 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 Sea Kelp?

The hex code is #354A55. In RGB it's 53, 74, 85, and in HSL it's 201°, 23%, 27%.

← All colors