BLUES

Deep Reservoir

#424F5F

RGB 66, 79, 95 · HSL 213°, 18%, 32% · CMYK 31, 17, 0, 63

Deep Reservoir is #424F5F in HEX — rgb(66, 79, 95), hsl(213°, 18%, 32%), cmyk(31%, 17%, 0%, 63%).

Deep Reservoir pulls into the rich end of the blues spectrum — HSL 213°, 18%, 32%. The neutral saturation makes it near-neutral and forgiving, 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#424F5F

RGB66, 79, 95

HSL213°, 18%, 32%

HSV213°, 31%, 37%

CMYK31, 17, 0, 63

Decimal4345695

CSS RGBrgb(66, 79, 95)

CSS HSLhsl(213, 18%, 32%)

Paint Matches — this color across 16 brands

Dunn-Edwards

Deep Reservoir DE5874

Exact match

Dulux

Breakaway Blue S38D8

ΔE 1.4 · #424E60

Valspar

Indigo Streamer 4010-4

ΔE 1.4 · #404C5B

PPG

Cavalry 1041-7

ΔE 1.8 · #3F4C5A

Behr

Secret Society MQ5-10

ΔE 1.9 · #464E5D

Kilz

Prussian Blue RD100-02

ΔE 2.4 · #444D5A

Sherwin-Williams

Indigo Batik SW7602

ΔE 2.4 · #3E5063

Vista Paint

Day Spa C-633

ΔE 2.7 · #3E5261

Benjamin Moore

Newburyport HC-155

ΔE 3 · #475667

Hallman-Lindsay

Into The Stratosphere 627

ΔE 3.4 · #425267

Farrow & Ball

Hague Blue 30

ΔE 5 · #3D4E57

Colorhouse

Wool .06 Wool-06

ΔE 5.1 · #485761

RAL

Slate Grey 7015

ΔE 6.1 · #434750

Kobra

Blue 31

ΔE 8.8 · #334059

IKEA

IKEA122 122

ΔE 9.6 · #3A5170

Dutch Boy

Seal of Grey VS-9301

ΔE 11.7 · #575757

Light Reflectance & Undertone

Light Reflectance Value (LRV)

8/100

Very Dark

0 · DarkLight · 100

Absorbs almost all light — dramatic and cocooning. Needs strong artificial lighting and works best as an accent or in well-lit rooms.

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

#424F5F

#605343

Analogous

#435F60

#424F5F

#444360

Triadic

#424F5F

#604350

#506043

Split-Complementary

#424F5F

#604443

#5F6043

Tetradic

#424F5F

#60435F

#605343

#436044

Monochromatic

#0A0D0F

#242B33

#424F5F

#62768D

#8D9CB0

Rectangle

#424F5F

#534360

#605343

#506043

Compound

#424F5F

#444360

#605343

#5F6043

Variations

Lighter

#5F7289

#8795A7

#BBC2CA

Darker

#35404E

#242C36

#151A20

Saturation

#4D5156

#435060

#214D82

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

8.35:1

AAA

vs Black

2.52:1

Fail

Deuteranopia

#424F5F

#474D5F

Original → Simulated

Protanopia

#424F5F

#4D4D5D

Original → Simulated

Tritanopia

#424F5F

#41524F

Original → Simulated

Color Psychology

Focused · Cooling

Deep Reservoir 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

#716862

Warm Bulb 2700K

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

#424F5F

Daylight 5500K

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

#5E6D87

Cool Bulb 6500K

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

Pairs With

#EAEBEB

Trim

Matched off-white

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

#F7F7F7

Ceiling

Whisper tint

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

#574734

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: #424F5F;

CSS — background

background-color: #424F5F;

CSS Variable

--color-deep-reservoir: #424F5F;

Tailwind v3 — config

colors: { 'deep-reservoir': '#424F5F' }

Tailwind — arbitrary

bg-[#424F5F] text-[#424F5F]

SCSS

$deep-reservoir: #424F5F;

Similar Colors

Newburyport Blue

#465566 · ΔE 2.6

Hudson Bay

#3F5266 · ΔE 3.2

Hale Navy

#434B56 · ΔE 3.8

In the Midnight Hour

#415663 · ΔE 4.3

Evening Sky

#464956 · ΔE 4.5

Blue Note

#404B54 · ΔE 4.8

Mysterious

#454B54 · ΔE 5.1

Brush Blue

#414F57 · ΔE 5.2

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 #424F5F?

#424F5F is Deep Reservoir, a deep blue with a cool undertone.

Is #424F5F warm or cool?

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

What rooms work best with Deep Reservoir?

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

What colors pair well with Deep Reservoir?

Deep Reservoir 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 Reservoir?

You can download Deep Reservoir 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 Reservoir?

The hex code is #424F5F. In RGB it's 66, 79, 95, and in HSL it's 213°, 18%, 32%.

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