BLUES

Coastline Blue

#4398BC

RGB 67, 152, 188 · HSL 198°, 47%, 50% · CMYK 64, 19, 0, 26

Coastline Blue is #4398BC in HEX — rgb(67, 152, 188), hsl(198°, 47%, 50%), cmyk(64%, 19%, 0%, 26%).

Coastline Blue pulls into the mid-tone end of the blues spectrum — HSL 198°, 47%, 50%. The balanced saturation makes it confident without overpowering, 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#4398BC

RGB67, 152, 188

HSL198°, 47%, 50%

HSV198°, 64%, 74%

CMYK64, 19, 0, 26

Decimal4430012

CSS RGBrgb(67, 152, 188)

CSS HSLhsl(198, 47%, 50%)

Paint Matches — this color across 16 brands

Behr

Honest Blue BIC-38

ΔE 2.5 · #4C96BB

Dulux

Opalescent S35E4

ΔE 2.9 · #3C98C1

Benjamin Moore

Electric 2061-40

ΔE 3.7 · #3F91B9

PPG

Hush-a-bye 1238-5

ΔE 3.7 · #5397B7

Sherwin-Williams

Jacaranda SW6802

ΔE 4.3 · #5A9EC0

Valspar

Pool Party 5002-10B

ΔE 4.3 · #2D9ABC

Farrow & Ball

St Giles Blue 280

ΔE 4.5 · #599EC4

Vista Paint

Bonaventure K-146

ΔE 4.6 · #4A9CC7

Kilz

Vintage Sapphire RD260-02

ΔE 5.1 · #569FBC

Dunn-Edwards

Mediterranean Sea DE5830

ΔE 6.8 · #1E8CAB

Hallman-Lindsay

Charybdis 661

ΔE 7.6 · #16A3CB

Kobra

Blue 29

ΔE 12.1 · #1882B4

IKEA

IKEA120 120

ΔE 13.9 · #6C8EA3

RAL

Light Blue 5012

ΔE 16.5 · #3B83BD

Dutch Boy

Sky Blue D-6742

ΔE 17.6 · #7AC2D8

Colorhouse

Dream .06 Dream-06

ΔE 21.9 · #0E707B

Light Reflectance & Undertone

Light Reflectance Value (LRV)

27/100

Medium

0 · DarkLight · 100

Balanced reflectance — holds colour without washing out. Versatile for most rooms and the most forgiving range for true-to-chip results.

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

#4398BC

#BB6844

Analogous

#44BBA3

#4398BC

#445CBB

Triadic

#4398BC

#BB4497

#97BB44

Split-Complementary

#4398BC

#BB445C

#BBA344

Tetradic

#4398BC

#A344BB

#BB6844

#5CBB44

Monochromatic

#1B3D4B

#2F6A83

#4398BC

#7CB7D0

#B4D6E4

Rectangle

#4398BC

#6844BB

#BB6844

#97BB44

Compound

#4398BC

#445CBB

#BB6844

#BBA344

Variations

Lighter

#69ACC9

#94BFD1

#C4D8E1

Darker

#347A98

#22556A

#13323F

Saturation

#6E8791

#4497BB

#22A5DD

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

3.25:1

AA Large

vs Black

6.46:1

Deuteranopia

#4398BC

#7487BD

Original → Simulated

Protanopia

#4398BC

#8E8EB8

Original → Simulated

Tritanopia

#4398BC

#3E9D97

Original → Simulated

Color Psychology

Focused · Cooling

Coastline 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

#729FA8

Warm Bulb 2700K

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

#4398BC

Daylight 5500K

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

#5FA4CC

Cool Bulb 6500K

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

Pairs With

#E9EBEC

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.

#985B41

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: #4398BC;

CSS — background

background-color: #4398BC;

CSS Variable

--color-coastline-blue: #4398BC;

Tailwind v3 — config

colors: { 'coastline-blue': '#4398BC' }

Tailwind — arbitrary

bg-[#4398BC] text-[#4398BC]

SCSS

$coastline-blue: #4398BC;

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#3E90B8 · ΔE 4.0

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#419AB7 · ΔE 4.5

Lake Tahoe

#4298C4 · ΔE 4.7

Sailor's Sea Blue

#4A93BE · ΔE 5.6

Yosemite Blue

#17A1C8 · ΔE 7.0

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#199FCC · ΔE 7.2

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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 #4398BC?

#4398BC is Coastline Blue, a mid-tone blue with a cool undertone.

Is #4398BC warm or cool?

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

What rooms work best with Coastline Blue?

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

What colors pair well with Coastline Blue?

Coastline 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 Coastline Blue?

You can download Coastline 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 Coastline Blue?

The hex code is #4398BC. In RGB it's 67, 152, 188, and in HSL it's 198°, 47%, 50%.

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