BLUES

Deep Blue Sea

#4387AC

RGB 67, 135, 172 · HSL 201°, 44%, 47% · CMYK 61, 22, 0, 33

Deep Blue Sea is #4387AC in HEX — rgb(67, 135, 172), hsl(201°, 44%, 47%), cmyk(61%, 22%, 0%, 33%).

Deep Blue Sea pulls into the mid-tone end of the blues spectrum — HSL 201°, 44%, 47%. 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#4387AC

RGB67, 135, 172

HSL201°, 44%, 47%

HSV201°, 61%, 67%

CMYK61, 22, 0, 33

Decimal4425644

CSS RGBrgb(67, 135, 172)

CSS HSLhsl(201, 44%, 47%)

Paint Matches — this color across 16 brands

Valspar

Deep Blue Sea 5001-10C

Exact match

Benjamin Moore

Finley CW-620

ΔE 3.7 · #4681A9

Dunn-Edwards

Blueberry Muffin DE5851

ΔE 3.9 · #5588AB

Kilz

Blue Eyed Beauty RD120-01

ΔE 3.9 · #4289A8

PPG

Cosmopolitan 1158-5

ΔE 3.9 · #528BAB

Dulux

Denim Blue S36F5

ΔE 4.1 · #4B80A5

Behr

Empire Blue MQ5-56

ΔE 5 · #5A90B3

Vista Paint

Peninsula C-653

ΔE 5.5 · #3B799C

Hallman-Lindsay

Peninsula 654

ΔE 5.5 · #37799C

Sherwin-Williams

Blue Plate SW6796

ΔE 7.5 · #017CA7

Kobra

Blue 29

ΔE 8.5 · #1882B4

Farrow & Ball

Cook's Blue 237

ΔE 8.6 · #6A90B4

IKEA

IKEA086 86

ΔE 12 · #748DAC

RAL

Light Blue 5012

ΔE 12.8 · #3B83BD

Dutch Boy

Celestial Horizon DCP-0589

ΔE 18.6 · #8FA4BF

Colorhouse

Dream .06 Dream-06

ΔE 19.9 · #0E707B

Light Reflectance & Undertone

Light Reflectance Value (LRV)

21/100

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

#4387AC

#AD6843

Analogous

#43AD9D

#4387AC

#4353AD

Triadic

#4387AC

#AD4388

#88AD43

Split-Complementary

#4387AC

#AD4353

#AD9D43

Tetradic

#4387AC

#9D43AD

#AD6843

#53AD43

Monochromatic

#18313E

#2E5C76

#4387AC

#73ABC9

#ABCCDE

Rectangle

#4387AC

#6843AD

#AD6843

#88AD43

Compound

#4387AC

#4353AD

#AD6843

#AD9D43

Variations

Lighter

#63A1C2

#90B7CC

#C1D4DE

Darker

#346D8C

#224B62

#132C3A

Saturation

#687D88

#4388AD

#2292CE

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

3.96:1

AA Large

vs Black

5.30:1

Deuteranopia

#4387AC

#677AAD

Original → Simulated

Protanopia

#4387AC

#7F7FA8

Original → Simulated

Tritanopia

#4387AC

#3E8D87

Original → Simulated

Color Psychology

Focused · Cooling

Deep Blue 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

#72929C

Warm Bulb 2700K

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

#4387AC

Daylight 5500K

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

#5F97C0

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.

#8C5A40

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: #4387AC;

CSS — background

background-color: #4387AC;

CSS Variable

--color-deep-blue-sea: #4387AC;

Tailwind v3 — config

colors: { 'deep-blue-sea': '#4387AC' }

Tailwind — arbitrary

bg-[#4387AC] text-[#4387AC]

SCSS

$deep-blue-sea: #4387AC;

Similar Colors

Finley Blue

#4580A8 · ΔE 3.9

Electric Blue

#3E90B8 · ΔE 4.2

Randolph Blue

#3C829F · ΔE 5.3

Sailor's Sea Blue

#4A93BE · ΔE 5.6

Poolside

#5394B4 · ΔE 5.8

Lazy Sunday

#5E8FB6 · ΔE 6.1

Blue Daisy

#548DA7 · ΔE 7.0

Lake Tahoe

#4298C4 · 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 #4387AC?

#4387AC is Deep Blue Sea, a mid-tone blue with a cool undertone.

Is #4387AC warm or cool?

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

What rooms work best with Deep Blue Sea?

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

What colors pair well with Deep Blue Sea?

Deep Blue 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 Deep Blue Sea?

You can download Deep Blue 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 Deep Blue Sea?

The hex code is #4387AC. In RGB it's 67, 135, 172, and in HSL it's 201°, 44%, 47%.

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