BLUES

December Eve

#25416D

RGB 37, 65, 109 · HSL 217°, 49%, 29% · CMYK 66, 40, 0, 57

December Eve is #25416D in HEX — rgb(37, 65, 109), hsl(217°, 49%, 29%), cmyk(66%, 40%, 0%, 57%).

December Eve pulls into the deep end of the blues spectrum — HSL 217°, 49%, 29%. 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#25416D

RGB37, 65, 109

HSL217°, 49%, 29%

HSV217°, 66%, 43%

CMYK66, 40, 0, 57

Decimal2441581

CSS RGBrgb(37, 65, 109)

CSS HSLhsl(217, 49%, 29%)

Paint Matches — this color across 16 brands

Behr

December Eve 580F-7

Exact match

Dulux

Mystification S41G8

ΔE 1.8 · #2A4270

Kilz

Indigo RH220

ΔE 3.9 · #314973

PPG

Dragonfly 1162-7

ΔE 4 · #314A76

Sherwin-Williams

Honorable Blue SW6811

ΔE 4.3 · #164576

Dutch Boy

Delft Blue 7447

ΔE 5.1 · #003B67

Hallman-Lindsay

Newport Indigo historic-newport-indigo

ΔE 5.2 · #313D6C

Benjamin Moore

Admiral 2065-10

ΔE 5.3 · #2C3863

Vista Paint

Midnight Interlude K-1243

ΔE 5.3 · #30466B

Dunn-Edwards

Nautical DEA139

ΔE 5.7 · #2E4A7D

RAL

Traffic Blue 5017

ΔE 9.1 · #063971

Valspar

Classic Royal Blue 4009-8

ΔE 9.2 · #465380

Kobra

Blue 30

ΔE 9.9 · #195584

IKEA

IKEA122 122

ΔE 11.3 · #3A5170

Colorhouse

Petal .05 Petal-05

ΔE 18.3 · #1F4992

Farrow & Ball

Pitch Blue 220

ΔE 21.3 · #636E8F

Light Reflectance & Undertone

Light Reflectance Value (LRV)

5/100

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

#25416D

#6E5226

Analogous

#26666E

#25416D

#2E266E

Triadic

#25416D

#6E2641

#416E26

Split-Complementary

#25416D

#6E2E26

#666E26

Tetradic

#25416D

#6E2666

#6E5226

#266E2E

Monochromatic

#070B13

#122035

#25416D

#3963A7

#638ACA

Rectangle

#25416D

#52266E

#6E5226

#416E26

Compound

#25416D

#2E266E

#6E5226

#666E26

Variations

Lighter

#3862A4

#6588C0

#AABBD5

Darker

#1D345A

#13243F

#0A1525

Saturation

#3F4755

#26416E

#133D81

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

10.22:1

AAA

vs Black

2.06:1

Fail

Deuteranopia

#25416D

#2A3F6D

Original → Simulated

Protanopia

#25416D

#3D3D69

Original → Simulated

Tritanopia

#25416D

#1C4A43

Original → Simulated

Color Psychology

Focused · Cooling

December Eve 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

#5B5D6D

Warm Bulb 2700K

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

#25416D

Daylight 5500K

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

#486291

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.

#594525

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: #25416D;

CSS — background

background-color: #25416D;

CSS Variable

--color-december-eve: #25416D;

Tailwind v3 — config

colors: { 'december-eve': '#25416D' }

Tailwind — arbitrary

bg-[#25416D] text-[#25416D]

SCSS

$december-eve: #25416D;

Similar Colors

Admiral Blue

#2B3762 · ΔE 5.6

Patriot Blue

#184A7C · ΔE 5.9

Downpour Blue

#254669 · ΔE 6.9

Symphony Blue

#203B5D · ΔE 6.9

Blue Grotto

#353963 · ΔE 7.0

Wizard

#40466D · ΔE 7.2

Blueberry Hill

#335183 · ΔE 7.5

Bold Blue

#2B3558 · ΔE 8.1

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 #25416D?

#25416D is December Eve, a deep blue with a cool undertone.

Is #25416D warm or cool?

December Eve reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with December Eve?

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

What colors pair well with December Eve?

December Eve 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 December Eve?

You can download December Eve 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 December Eve?

The hex code is #25416D. In RGB it's 37, 65, 109, and in HSL it's 217°, 49%, 29%.

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