BLUES

Peaceful River

#51C6F9

RGB 81, 198, 249 · HSL 198°, 93%, 65% · CMYK 67, 20, 0, 2

Peaceful River is #51C6F9 in HEX — rgb(81, 198, 249), hsl(198°, 93%, 65%), cmyk(67%, 20%, 0%, 2%).

Peaceful River pulls into the light end of the blues spectrum — HSL 198°, 93%, 65%. The saturated saturation makes it bold and immediate, 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#51C6F9

RGB81, 198, 249

HSL198°, 93%, 65%

HSV198°, 67%, 98%

CMYK67, 20, 0, 2

Decimal5359353

CSS RGBrgb(81, 198, 249)

CSS HSLhsl(198, 93%, 65%)

Paint Matches — this color across 16 brands

Behr

Peaceful River P500-5

Exact match

Dulux

Norfolk Sky S35H2

ΔE 7.8 · #6CBEE7

Benjamin Moore

True 2066-50

ΔE 7.9 · #6DBBEB

Dunn-Edwards

Sail Away DE5836

ΔE 8.2 · #55B4DE

Valspar

Sea Frolic 4008-10A

ΔE 9.1 · #6DB9E3

PPG

Xavier Blue 1240-4

ΔE 10 · #6AB4E0

Hallman-Lindsay

Robin's Egg historic-robins-egg

ΔE 10.6 · #64B0DC

Vista Paint

Sunrise River K-171

ΔE 11.5 · #56B5D6

Kilz

Azure Pool RD240-01

ΔE 11.8 · #67B0D7

Sherwin-Williams

Flyway SW6794

ΔE 12.1 · #5DB3D4

Kobra

Blue 28

ΔE 15.3 · #4EB3CD

Dutch Boy

Sky Blue D-6742

ΔE 16.7 · #7AC2D8

Farrow & Ball

St Giles Blue 280

ΔE 17 · #599EC4

IKEA

IKEA085 85

ΔE 20.5 · #9FC1DF

RAL

Light Blue 5012

ΔE 26.6 · #3B83BD

Colorhouse

Dream .03 Dream-03

ΔE 28.5 · #B4CBD9

Light Reflectance & Undertone

Light Reflectance Value (LRV)

49/100

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

#51C6F9

#F98553

Analogous

#53F9D8

#51C6F9

#5374F9

Triadic

#51C6F9

#F953C7

#C7F953

Split-Complementary

#51C6F9

#F95374

#F9D853

Tetradic

#51C6F9

#D853F9

#F98553

#74F953

Monochromatic

#067AAC

#09AFF6

#51C6F9

#9DDFFB

#E6F7FE

Rectangle

#51C6F9

#8553F9

#F98553

#C7F953

Compound

#51C6F9

#5374F9

#F98553

#F9D853

Variations

Lighter

#75D2FA

#9FDAF4

#CBE8F4

Darker

#0DB4FC

#0080B6

#004A6A

Saturation

#8DB0BF

#53C7F9

#50C8FC

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

1.95:1

Fail

vs Black

10.80:1

AAA

Deuteranopia

#51C6F9

#95B0FB

Original → Simulated

Protanopia

#51C6F9

#B9B9F3

Original → Simulated

Tritanopia

#51C6F9

#49CEC5

Original → Simulated

Color Psychology

Focused · Cooling

Peaceful River 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

#7CC1D6

Warm Bulb 2700K

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

#51C6F9

Daylight 5500K

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

#69C6FA

Cool Bulb 6500K

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

Pairs With

#E7ECEE

Trim

Matched off-white

Same hue at 92% lightness — trim reads coordinated, not stark.

#F7F8F8

Ceiling

Whisper tint

Near-white with a hint of the hero's undertone — ceiling feels intentional.

#E76933

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: #51C6F9;

CSS — background

background-color: #51C6F9;

CSS Variable

--color-peaceful-river: #51C6F9;

Tailwind v3 — config

colors: { 'peaceful-river': '#51C6F9' }

Tailwind — arbitrary

bg-[#51C6F9] text-[#51C6F9]

SCSS

$peaceful-river: #51C6F9;

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#6CBAEA · ΔE 8.0

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#74BAE3 · ΔE 10.2

Cayman Blue

#73C1E4 · ΔE 10.3

Sea to Shining Sea

#6DB4DC · ΔE 11.1

Aquarius

#7BBDE1 · ΔE 11.9

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#76C4E2 · ΔE 12.4

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#5EABD1 · ΔE 12.8

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 #51C6F9?

#51C6F9 is Peaceful River, a soft blue with a cool undertone.

Is #51C6F9 warm or cool?

Peaceful River reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Peaceful River?

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

What colors pair well with Peaceful River?

Peaceful River 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 Peaceful River?

You can download Peaceful River 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 Peaceful River?

The hex code is #51C6F9. In RGB it's 81, 198, 249, and in HSL it's 198°, 93%, 65%.

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