BLUES

High Alter

#33517B

RGB 51, 81, 123 · HSL 215°, 41%, 34% · CMYK 59, 34, 0, 52

High Alter is #33517B in HEX — rgb(51, 81, 123), hsl(215°, 41%, 34%), cmyk(59%, 34%, 0%, 52%).

High Alter pulls into the rich end of the blues spectrum — HSL 215°, 41%, 34%. 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#33517B

RGB51, 81, 123

HSL215°, 41%, 34%

HSV215°, 59%, 48%

CMYK59, 34, 0, 52

Decimal3363195

CSS RGBrgb(51, 81, 123)

CSS HSLhsl(215, 41%, 34%)

Paint Matches — this color across 16 brands

Dulux

High Alter S39E8

Exact match

Dunn-Edwards

Slumber DE5860

ΔE 1.4 · #2D517C

Behr

Infinite Deep Sea S500-7

ΔE 2.3 · #2B537E

Kilz

Indigo RH220

ΔE 3.6 · #314973

PPG

Dragonfly 1162-7

ΔE 3.6 · #314A76

Vista Paint

Inky Sea K-1244

ΔE 4.1 · #274B71

Sherwin-Williams

Indigo SW6531

ΔE 4.1 · #284A70

Benjamin Moore

Blueberry 812

ΔE 5.1 · #345284

Valspar

Precious Sapphire 4010-7

ΔE 5.3 · #44597E

RAL

Capri Blue 5019

ΔE 5.5 · #1B5583

Kobra

Blue 30

ΔE 5.9 · #195584

IKEA

IKEA122 122

ΔE 6.9 · #3A5170

Hallman-Lindsay

Ocean Spray 662

ΔE 9 · #005379

Dutch Boy

Delft Blue 7447

ΔE 10.6 · #003B67

Farrow & Ball

Pitch Blue 220

ΔE 15 · #636E8F

Colorhouse

Petal .05 Petal-05

ΔE 20.3 · #1F4992

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

#33517B

#7A5D33

Analogous

#33747A

#33517B

#39337A

Triadic

#33517B

#7A3351

#517A33

Split-Complementary

#33517B

#7A3933

#747A33

Tetradic

#33517B

#7A3374

#7A5D33

#337A39

Monochromatic

#080C12

#1D2D44

#33517B

#4A74B0

#7E9DC9

Rectangle

#33517B

#5D337A

#7A5D33

#517A33

Compound

#33517B

#39337A

#7A5D33

#747A33

Variations

Lighter

#4770AA

#7794BD

#B3C1D5

Darker

#284063

#1A2C45

#0F1A29

Saturation

#4C5561

#33517A

#1A4D94

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

8.07:1

AAA

vs Black

2.60:1

Fail

Deuteranopia

#33517B

#3B4E7C

Original → Simulated

Protanopia

#33517B

#4D4D77

Original → Simulated

Tritanopia

#33517B

#2C5953

Original → Simulated

Color Psychology

Focused · Cooling

High Alter 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

#666977

Warm Bulb 2700K

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

#33517B

Daylight 5500K

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

#536E9C

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.

#634E30

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: #33517B;

CSS — background

background-color: #33517B;

CSS Variable

--color-high-alter: #33517B;

Tailwind v3 — config

colors: { 'high-alter': '#33517B' }

Tailwind — arbitrary

bg-[#33517B] text-[#33517B]

SCSS

$high-alter: #33517B;

Similar Colors

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#335183 · ΔE 5.1

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#2F5688 · ΔE 5.3

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#254669 · ΔE 6.5

Patriot Blue

#184A7C · ΔE 6.7

Prussian Blue

#325A7D · ΔE 6.8

New York State of Mind

#355473 · ΔE 7.3

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#005381 · ΔE 7.3

Mistral

#10557D · ΔE 7.5

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 #33517B?

#33517B is High Alter, a deep blue with a cool undertone.

Is #33517B warm or cool?

High Alter reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with High Alter?

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

What colors pair well with High Alter?

High Alter 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 High Alter?

You can download High Alter 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 High Alter?

The hex code is #33517B. In RGB it's 51, 81, 123, and in HSL it's 215°, 41%, 34%.

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