BLUES

Yuè Guāng Lán Blue

#2138AB

RGB 33, 56, 171 · HSL 230°, 68%, 40% · CMYK 81, 67, 0, 33

Yuè Guāng Lán Blue is #2138AB in HEX — rgb(33, 56, 171), hsl(230°, 68%, 40%), cmyk(81%, 67%, 0%, 33%).

Yuè Guāng Lán Blue pulls into the rich end of the blues spectrum — HSL 230°, 68%, 40%. 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#2138AB

RGB33, 56, 171

HSL230°, 68%, 40%

HSV230°, 81%, 67%

CMYK81, 67, 0, 33

Decimal2177195

CSS RGBrgb(33, 56, 171)

CSS HSLhsl(230, 68%, 40%)

Paint Matches — this color across 16 brands

Behr

Sailboat S-H-590

ΔE 4.6 · #0A35A1

Dutch Boy

Blue Royale VS-9550

ΔE 21.6 · #243F90

Colorhouse

Petal .05 Petal-05

ΔE 28.8 · #1F4992

RAL

Signal Blue 5005

ΔE 30.3 · #1E2D6E

Vista Paint

Blue Highlight C-612

ΔE 31.6 · #334688

PPG

Crushed Velvet 1245-7

ΔE 32.2 · #445397

Hallman-Lindsay

Blue Highlight 613

ΔE 33 · #324A8B

Benjamin Moore

Evening 2066-20

ΔE 33.8 · #014F94

Dunn-Edwards

Beaded Blue DE5909

ΔE 34.4 · #494D8B

Dulux

Purple Geisha SB8G7

ΔE 34.9 · #54518F

Kobra

Violet 25

ΔE 39.4 · #776BAB

Valspar

Homecoming Blue 4009-9

ΔE 40 · #484E83

Sherwin-Williams

Morning Glory SW6971

ΔE 40.8 · #3C4C80

Kilz

Superstition RH250

ΔE 41.1 · #604C7F

IKEA

IKEA128 128

ΔE 43.5 · #4A72B0

Farrow & Ball

Pitch Blue 220

ΔE 56.3 · #636E8F

Light Reflectance & Undertone

Light Reflectance Value (LRV)

6/100

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

#2138AB

#AB9421

Analogous

#217DAB

#2138AB

#4F21AB

Triadic

#2138AB

#AB2138

#38AB21

Split-Complementary

#2138AB

#AB4F21

#7DAB21

Tetradic

#2138AB

#AB217D

#AB9421

#21AB4F

Monochromatic

#080E2B

#14236B

#2138AB

#3E58DA

#7E90E7

Rectangle

#2138AB

#9421AB

#AB9421

#38AB21

Compound

#2138AB

#4F21AB

#AB9421

#7DAB21

Variations

Lighter

#314DD8

#6E80D8

#B0B8E3

Darker

#172B8C

#0E1C62

#07103A

Saturation

#51587B

#2138AB

#102DBC

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

9.47:1

AAA

vs Black

2.22:1

Fail

Deuteranopia

#2138AB

#0048AB

Original → Simulated

Protanopia

#2138AB

#3535A2

Original → Simulated

Tritanopia

#2138AB

#005845

Original → Simulated

Color Psychology

Focused · Cooling

Yuè Guāng Lán 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

#58579B

Warm Bulb 2700K

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

#2138AB

Daylight 5500K

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

#455CC0

Cool Bulb 6500K

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

Pairs With

#E8E9ED

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.

#897825

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: #2138AB;

CSS — background

background-color: #2138AB;

CSS Variable

--color-yuè-guāng-lán-blue: #2138AB;

Tailwind v3 — config

colors: { 'yuè-guāng-lán-blue': '#2138AB' }

Tailwind — arbitrary

bg-[#2138AB] text-[#2138AB]

SCSS

$yuè-guāng-lán-blue: #2138AB;

Similar Colors

Warriors Blue

#00498D · ΔE 33.1

Evening Blue

#004E93 · ΔE 33.6

Twilight Blue

#365496 · ΔE 34.4

Scandinavian Blue

#4E4E8C · ΔE 34.5

Blue

#233872 · ΔE 35.5

Delphinium

#304C89 · ΔE 36.0

Big Country Blue

#0066B1 · ΔE 36.7

Mystical Grape

#664B86 · ΔE 37.0

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 #2138AB?

#2138AB is Yuè Guāng Lán Blue, a mid-tone blue with a cool undertone.

Is #2138AB warm or cool?

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

What rooms work best with Yuè Guāng Lán Blue?

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

What colors pair well with Yuè Guāng Lán Blue?

Yuè Guāng Lán 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 Yuè Guāng Lán Blue?

You can download Yuè Guāng Lán 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 Yuè Guāng Lán Blue?

The hex code is #2138AB. In RGB it's 33, 56, 171, and in HSL it's 230°, 68%, 40%.

← All colors