#181F40#181F40

#181F40 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.2% C 0.063 H 272.2°. Best body text is #FFFFFF at 16.05:1 contrast (WCAG AA passes).

Color values

HEX	#181F40
RGB	rgb(24, 31, 64)
HSL	hsl(230, 45%, 17%)
HSV	hsv(230, 63%, 25%)
CMYK	cmyk(62.5%, 51.6%, 0%, 74.9%)
CIE-LAB	lab(12.89, 8.56, -22.07)
CIE-LCH	lch(12.89, 23.67, 291.20°)
OKLab	oklab(25.22% 0.0024 -0.0628)
OKLCH	oklch(25.22% 0.063 272.2)
XYZ	xyz(1.7918, 1.5442, 5.0531)
Luminance	0.0154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F40 #403918

analogous

#183340 #181F40 #251840

triadic

#181F40 #40181F #1F4018

tetradic

#181F40 #401833 #403918 #184025

square

#181F40 #401833 #403918 #184025

split-complementary

#181F40 #402518 #334018

monochromatic

#080B16 #080B16 #181F40 #29356D #394A99

Accessibility & contrast

On white

16.05

#181F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F40

16.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F40	#FFFFFF	#000000	##FFFFFF
##181F40	1.00	16.05	1.31	16.05
#FFFFFF	16.05	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#102341

Deuteranopia (green-blind)

#0B203F

Tritanopia (blue-blind)

#04262C

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181f40;
/* rgb */ color: rgb(24, 31, 64);
/* oklch */ color: oklch(25.2% 0.063 272.2);

Tailwind

colors: {
  custom: {
    50: '#595a75',
    500: '#181f40',
    950: '#000000',
  },
}

SCSS

$custom: #181f40;
$custom-light: #595a75;
$custom-dark: #000000;

JSON

{
  "hex": "#181f40",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 64
  },
  "hsl": {
    "h": 229.5,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.2522,
    "c": 0.06287,
    "h": 272.2
  },
  "luminance": 0.01544
}

Semantic roles & 50–950 ramp

primary

#181F40

secondary

#776C3D

accent

#BE53D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181F40

Body copy rendered with the generated semantic roles for this colour.

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