BLUES

Bio Blue

#45619D

RGB 69, 97, 157 · HSL 221°, 39%, 44% · CMYK 56, 38, 0, 38

Bio Blue is #45619D in HEX — rgb(69, 97, 157), hsl(221°, 39%, 44%), cmyk(56%, 38%, 0%, 38%).

Bio Blue pulls into the rich end of the blues spectrum — HSL 221°, 39%, 44%. 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#45619D

RGB69, 97, 157

HSL221°, 39%, 44%

HSV221°, 56%, 62%

CMYK56, 38, 0, 38

Decimal4546973

CSS RGBrgb(69, 97, 157)

CSS HSLhsl(221, 39%, 44%)

Paint Matches — this color across 16 brands

Dulux

Bio Blue S41H7 · SB8E5

Exact match

Dunn-Edwards

Starstruck DE5894

ΔE 3.1 · #4664A5

Valspar

Deep Space 4008-8C

ΔE 3.5 · #38619B

Benjamin Moore

Mosaic CC-874

ΔE 3.9 · #3963A4

Hallman-Lindsay

Fresh Take 1278

ΔE 5.1 · #505B93

Behr

New Age Blue PPU15-5

ΔE 5.6 · #486EAE

Vista Paint

Fresh Take C-1277

ΔE 6 · #515992

PPG

Cenote 17-02

ΔE 6.8 · #5072B1

IKEA

IKEA128 128

ΔE 7 · #4A72B0

Kilz

Sapphire Sequin RB120-02

ΔE 7 · #4B568A

Sherwin-Williams

Frank Blue SW6967

ΔE 8.7 · #225288

Dutch Boy

Blue Sea VS-9451

ΔE 10 · #2D61AD

RAL

Sky Blue 5015

ΔE 10.7 · #2271B3

Kobra

Blue 30

ΔE 12.3 · #195584

Colorhouse

Petal .05 Petal-05

ΔE 13.8 · #1F4992

Farrow & Ball

Pitch Blue 220

ΔE 17.7 · #636E8F

Light Reflectance & Undertone

Light Reflectance Value (LRV)

12/100

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

#45619D

#9C8044

Analogous

#448C9C

#45619D

#54449C

Triadic

#45619D

#9C4460

#609C44

Split-Complementary

#45619D

#9C5444

#8C9C44

Tetradic

#45619D

#9C448C

#9C8044

#449C54

Monochromatic

#161F32

#2D3F67

#45619D

#6E87BF

#A3B3D7

Rectangle

#45619D

#80449C

#9C8044

#609C44

Compound

#45619D

#54449C

#9C8044

#8C9C44

Variations

Lighter

#607CB9

#8D9FC6

#BFC8DB

Darker

#354C7F

#233458

#141E34

Saturation

#636B7D

#44609C

#2254BE

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

6.09:1

vs Black

3.45:1

AA Large

Deuteranopia

#45619D

#46619E

Original → Simulated

Protanopia

#45619D

#5D5D97

Original → Simulated

Tritanopia

#45619D

#3B6D65

Original → Simulated

Color Psychology

Focused · Cooling

Bio 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

#737591

Warm Bulb 2700K

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

#45619D

Daylight 5500K

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

#607AB5

Cool Bulb 6500K

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

Pairs With

#E9EAEC

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.

#7F6B40

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: #45619D;

CSS — background

background-color: #45619D;

CSS Variable

--color-bio-blue: #45619D;

Tailwind v3 — config

colors: { 'bio-blue': '#45619D' }

Tailwind — arbitrary

bg-[#45619D] text-[#45619D]

SCSS

$bio-blue: #45619D;

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#3862A3 · ΔE 3.9

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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 #45619D?

#45619D is Bio Blue, a mid-tone blue with a cool undertone.

Is #45619D warm or cool?

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

What rooms work best with Bio Blue?

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

What colors pair well with Bio Blue?

Bio 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 Bio Blue?

You can download Bio 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 Bio Blue?

The hex code is #45619D. In RGB it's 69, 97, 157, and in HSL it's 221°, 39%, 44%.

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