BLUES

Peek-A-Boo Blue

#3370AC

RGB 51, 112, 172 · HSL 210°, 54%, 44% · CMYK 70, 35, 0, 33

Peek-A-Boo Blue is #3370AC in HEX — rgb(51, 112, 172), hsl(210°, 54%, 44%), cmyk(70%, 35%, 0%, 33%).

Peek-A-Boo Blue pulls into the rich end of the blues spectrum — HSL 210°, 54%, 44%. 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#3370AC

RGB51, 112, 172

HSL210°, 54%, 44%

HSV210°, 70%, 67%

CMYK70, 35, 0, 33

Decimal3371180

CSS RGBrgb(51, 112, 172)

CSS HSLhsl(210, 54%, 44%)

Paint Matches — this color across 16 brands

Valspar

Peek-A-Boo Blue 4007-10C

Exact match

PPG

Wright Bluebird FLLW514

ΔE 1.6 · #356FAD

Vista Paint

Bowen Blue C-1376

ΔE 2.7 · #246CA6

Benjamin Moore

Athens 797

ΔE 3.3 · #3E75AD

Behr

Sailors Bay M510-5

ΔE 3.4 · #3775AD

RAL

Sky Blue 5015

ΔE 3.8 · #2271B3

Hallman-Lindsay

Bowen Blue historic-bowen-blue

ΔE 3.9 · #126DA8

Dulux

Perfect Ocean S39G7

ΔE 4.1 · #3066A0

IKEA

IKEA128 128

ΔE 4.8 · #4A72B0

Sherwin-Williams

Blue Chip SW6959

ΔE 5.5 · #016EA7

Dunn-Edwards

Americana DE5845

ΔE 6 · #0477B4

Kilz

Aspiration RH190

ΔE 6.1 · #217AB4

Kobra

Blue 29

ΔE 12.5 · #1882B4

Dutch Boy

Blue Sea VS-9451

ΔE 12.8 · #2D61AD

Farrow & Ball

Pitch Blue 220

ΔE 18.7 · #636E8F

Colorhouse

Petal .05 Petal-05

ΔE 19.8 · #1F4992

Light Reflectance & Undertone

Light Reflectance Value (LRV)

15/100

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

#3370AC

#AD7034

Analogous

#34ADAD

#3370AC

#3434AD

Triadic

#3370AC

#AD3470

#70AD34

Split-Complementary

#3370AC

#AD3434

#ADAD34

Tetradic

#3370AC

#AD34AD

#AD7034

#34AD34

Monochromatic

#102437

#224A72

#3370AC

#5E96CF

#99BDE1

Rectangle

#3370AC

#7034AD

#AD7034

#70AD34

Compound

#3370AC

#3434AD

#AD7034

#ADAD34

Variations

Lighter

#4F8DCA

#82A9D1

#BACDE0

Darker

#275A8D

#193E62

#0E243A

Saturation

#5E7082

#3470AD

#1A70C7

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

5.18:1

vs Black

4.05:1

AA Large

Deuteranopia

#3370AC

#4A69AD

Original → Simulated

Protanopia

#3370AC

#6969A6

Original → Simulated

Tritanopia

#3370AC

#237B72

Original → Simulated

Color Psychology

Focused · Cooling

Peek-A-Boo 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

#66819C

Warm Bulb 2700K

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

#3370AC

Daylight 5500K

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

#5386C0

Cool Bulb 6500K

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

Pairs With

#E9EBED

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.

#8B5F34

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: #3370AC;

CSS — background

background-color: #3370AC;

CSS Variable

--color-peek-a-boo-blue: #3370AC;

Tailwind v3 — config

colors: { 'peek-a-boo-blue': '#3370AC' }

Tailwind — arbitrary

bg-[#3370AC] text-[#3370AC]

SCSS

$peek-a-boo-blue: #3370AC;

Similar Colors

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#3D74AC · ΔE 3.0

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#1369A7 · ΔE 4.0

Ol' Blue Eyes

#0062A0 · ΔE 6.5

Brilliant Blue

#0063A6 · ΔE 7.4

Mosaic

#3862A3 · ΔE 7.9

Old Glory

#396998 · ΔE 8.0

Waterdrop

#5C79B3 · ΔE 8.2

Watertown

#5B7EB7 · ΔE 8.3

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 #3370AC?

#3370AC is Peek-A-Boo Blue, a mid-tone blue with a cool undertone.

Is #3370AC warm or cool?

Peek-A-Boo Blue reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with Peek-A-Boo Blue?

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

What colors pair well with Peek-A-Boo Blue?

Peek-A-Boo 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 Peek-A-Boo Blue?

You can download Peek-A-Boo 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 Peek-A-Boo Blue?

The hex code is #3370AC. In RGB it's 51, 112, 172, and in HSL it's 210°, 54%, 44%.

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