#181E40#181E40

#181E40 is a very dark, moderate blue. Relative luminance 0.015; OKLCH L 25.0% C 0.064 H 273.3°. Best body text is #FFFFFF at 16.17:1 contrast (WCAG AA passes).

Color values

HEX	#181E40
RGB	rgb(24, 30, 64)
HSL	hsl(231, 45%, 17%)
HSV	hsv(231, 63%, 25%)
CMYK	cmyk(62.5%, 53.1%, 0%, 74.9%)
CIE-LAB	lab(12.56, 9.32, -22.59)
CIE-LCH	lch(12.56, 24.43, 292.42°)
OKLab	oklab(24.97% 0.0037 -0.0644)
OKLCH	oklch(24.97% 0.064 273.3)
XYZ	xyz(1.7661, 1.4928, 5.0446)
Luminance	0.0149 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E40 #403A18

analogous

#183240 #181E40 #261840

triadic

#181E40 #40181E #1E4018

tetradic

#181E40 #401832 #403A18 #184026

square

#181E40 #401832 #403A18 #184026

split-complementary

#181E40 #402618 #324018

monochromatic

#080A16 #080A16 #181E40 #29336D #394899

Accessibility & contrast

On white

16.17

#181E40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#181E40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E40

16.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E40	#FFFFFF	#000000	##FFFFFF
##181E40	1.00	16.17	1.30	16.17
#FFFFFF	16.17	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E2241

Deuteranopia (green-blind)

#091F3F

Tritanopia (blue-blind)

#04252B

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181e40;
/* rgb */ color: rgb(24, 30, 64);
/* oklch */ color: oklch(25.0% 0.064 273.3);

Tailwind

colors: {
  custom: {
    50: '#595975',
    500: '#181e40',
    950: '#000000',
  },
}

SCSS

$custom: #181e40;
$custom-light: #595975;
$custom-dark: #000000;

JSON

{
  "hex": "#181e40",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 64
  },
  "hsl": {
    "h": 231,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.24973,
    "c": 0.06447,
    "h": 273.3
  },
  "luminance": 0.01493
}

Semantic roles & 50–950 ramp

primary

#181E40

secondary

#776E3D

accent

#C253D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181E40

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

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