Maastricht Blue (#001C3D)

The hex code for Maastricht Blue is #001C3D. It is rgb(0, 28, 61) in RGB, hsl(212, 100%, 12%) in HSL, and about cmyk(100%, 54%, 0%, 76%) in CMYK — a darkest blue. White text is the more readable choice on this background.

#001C3D

HEX#001C3D

RGBrgb(0, 28, 61)

HSLhsl(212, 100%, 12%)

HSVhsv(212, 100%, 24%)

CMYKcmyk(100%, 54%, 0%, 76%)

OKLCHoklch(22.8% 0.072 253.9)

LABlab(9.92% 1.35 -24.70)

LCHlch(9.92% 24.74 273.12)

Colors Closest to Maastricht Blue

Maastricht Blue is a registered color name. These are the named colors nearest to it, measured as CIE76 distance in CIELAB — a perceptual scale, so the ordering matches what the eye sees rather than how close the raw RGB numbers happen to sit.

Oxford Blue#002147ΔE 3.91 Deep Navy#0B1F3AΔE 4.8 Space Cadet#1D2951ΔE 8.83 Prussian Blue#003153ΔE 10.53 Dark Midnight Blue#003366ΔE 14.95 Marine Blue#01386AΔE 16.1

Browse the full index of named colors A-Z or every blue in the library.

#001C3D Channel Values

How Maastricht Blue breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 0 · G 28 · B 61	8-bit channels as sent to the display
HSL	H 212° · S 100% · L 12%	Easiest model for building lighter and darker variants
HSV	H 212° · S 100% · V 24%	Matches the picker in most design tools
CMYK	C 100% · M 54% · Y 0% · K 76%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	17.02:1 vs white · 1.23:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a Maastricht Blue background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text17.02:1AA normal AA large AAA normal

Fails AABlack text1.23:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #001C3D in the contrast checker.

Colors That Go With Maastricht Blue

Pairings derived from color-wheel relationships. The complementary color sits opposite Maastricht Blue; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of Maastricht Blue

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #001C3D.

How Maastricht Blue Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#001C3D

Protanopia#19193D

Protanomaly#111A3D

Deuteranopia#16163D

Deuteranomaly#0F183D

Tritanopia#002222

Tritanomaly#00202F

Achromatopsia#1C1C1C

Test a full palette in the color blindness simulator.

Using #001C3D in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--maastricht-blue: #001C3D;

CSS backgroundbackground-color: #001C3D;

Tailwind configcolors: { 'maastricht-blue': '#001C3D' }

SwiftUIColor(red: 0.000, green: 0.110, blue: 0.239)

Android XML<color name="maastricht_blue">#001C3D</color>

SVG fillfill="#001C3D"

More Blue Colors

Maastricht Blue sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

002147 001c38 002387 0018a8 002395 0014a8 002e57 000f89 003061 0000ff 003153 0000f5 007bb8 0f172b 1c398e 2a2069 372a89 4d4dff 627dca 7979e2 94b1ff b6e1fc d3edfd f2f2fc

#001C3D Frequently Asked Questions

What is the hex code for Maastricht Blue?

The hex code for Maastricht Blue is #001C3D. That is rgb(0, 28, 61) in RGB, hsl(212, 100%, 12%) in HSL, and approximately cmyk(100%, 54%, 0%, 76%) in CMYK.

What is the RGB value of #001C3D?

#001C3D is rgb(0, 28, 61) — red 0, green 28, and blue 61 on the 0-255 scale.

What is the CMYK value of #001C3D?

#001C3D converts to approximately cmyk(100%, 54%, 0%, 76%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #001C3D be black or white?

White text is the more readable choice. #001C3D scores 17.02:1 against white and 1.23:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #001C3D as a CSS color keyword?

No. #001C3D is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is black (#000000) at a CIE76 distance of 26.65, which is a different colour altogether.

Open Maastricht Blue in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.