BLUES

School Ink

#31373F

RGB 49, 55, 63 · HSL 214°, 13%, 22% · CMYK 22, 13, 0, 75

School Ink is #31373F in HEX — rgb(49, 55, 63), hsl(214°, 13%, 22%), cmyk(22%, 13%, 0%, 75%).

School Ink pulls into the deep end of the blues spectrum — HSL 214°, 13%, 22%. 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#31373F
RGB49, 55, 63
HSL214°, 13%, 22%
HSV214°, 22%, 25%
CMYK22, 13, 0, 75
Decimal3225407
CSS RGBrgb(49, 55, 63)
CSS HSLhsl(214, 13%, 22%)

Paint Matches — this color across 16 brands

Dulux

School Ink S38A9

Exact match

RAL

Granite Grey 7026

ΔE 1.6 · #2F353B

Benjamin Moore

After CSP-630

ΔE 1.7 · #34393F

Behr

Catwalk N550-7

ΔE 2.3 · #343944

Vista Paint

In the Navy K-800

ΔE 2.5 · #313B45

Sherwin-Williams

Inkwell SW6992

ΔE 2.7 · #31363A

Hallman-Lindsay

Octavius 522

ΔE 2.8 · #38393F

Colorhouse

Nourish .06 Nourish-06

ΔE 4.8 · #313536

Valspar

Twilight Purple 4010-2

ΔE 5.1 · #3E3B46

PPG

Wright Midnight FLLW36

ΔE 5.3 · #404149

Kilz

Night Magic RM230

ΔE 5.6 · #3C4348

Dunn-Edwards

Dark Engine DE6350

ΔE 5.9 · #3E3F41

Kobra

Black 44

ΔE 6.1 · #383737

IKEA

IKEA186 186

ΔE 6.9 · #302F2F

Farrow & Ball

Pitch Black 256

ΔE 7 · #3B3938

Dutch Boy

Dark Chocolate D-6782

ΔE 13.2 · #392A27

Light Reflectance & Undertone

Light Reflectance Value (LRV)

4/100

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

#31373F
#3F3931

Analogous

#313E3F
#31373F
#32313F

Triadic

#31373F
#3F3137
#373F31

Split-Complementary

#31373F
#3F3231
#3E3F31

Tetradic

#31373F
#3F313E
#3F3931
#313F32

Monochromatic

#0B0D0E
#101214
#31373F
#525D6B
#758295

Rectangle

#31373F
#39313F
#3F3931
#373F31

Compound

#31373F
#32313F
#3F3931
#3E3F31

Variations

Lighter

#535E6C
#7A8695
#B3B9C0

Darker

#272C33
#1A1E23
#0F1215

Saturation

#36383A
#31373F
#183458

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)

Aa

vs White

12.01:1

AAA

Aa

vs Black

1.75:1

Fail

Deuteranopia

#31373F
#33363F

Original → Simulated

Protanopia

#31373F
#36363E

Original → Simulated

Tritanopia

#31373F
#303837

Original → Simulated

Color Psychology

Focused · Cooling

School Ink 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

#64564A

Warm Bulb 2700K

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

#31373F

Daylight 5500K

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

#515B6F

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.

#3C3124

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 / Aura Interior (for richer color depth in deep tones)

Recommended Finishes

Matte (walls) · Pearl (trim) · Satin (doors)

Deep colors look best in matte — gloss exaggerates surface flaws. Reserve subtle sheen for trim, doors, and high-touch areas.

Best Surfaces

Accent walls · Doors · Cabinetry · Built-ins

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

Tinted primer in a similar value is highly recommended — saves a coat and prevents the wall colour from washing the surface.

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

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: #31373F;
CSS — background 
background-color: #31373F;
CSS Variable 
--color-school-ink: #31373F;
Tailwind v3 — config 
colors: { 'school-ink': '#31373F' }
Tailwind — arbitrary 
bg-[#31373F] text-[#31373F]
SCSS 
$school-ink: #31373F;

Similar Colors

After Midnight

#33383E · ΔE 1.5

Polo Blue

#323A43 · ΔE 1.6

Soot

#373C41 · ΔE 3.0

Black Ink

#373A3D · ΔE 3.8

Black Berry

#3A3B3F · ΔE 4.0

Toucan Black

#3C3B40 · ΔE 4.2

Midnight Dream

#323436 · ΔE 4.4

Ebony King

#383A3C · ΔE 4.5
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 #31373F?

#31373F is School Ink, a deep blue with a cool undertone.

Is #31373F warm or cool?

School Ink reads cool, which influences how it interacts with surrounding tones and natural light.

What rooms work best with School Ink?

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

What colors pair well with School Ink?

School Ink 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 School Ink?

You can download School Ink 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 School Ink?

The hex code is #31373F. In RGB it's 49, 55, 63, and in HSL it's 214°, 13%, 22%.

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