#181C40#181C40

#181C40 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.5% C 0.068 H 275.5°. Best body text is #FFFFFF at 16.42:1 contrast (WCAG AA passes).

Color values

HEX	#181C40
RGB	rgb(24, 28, 64)
HSL	hsl(234, 45%, 17%)
HSV	hsv(234, 63%, 25%)
CMYK	cmyk(62.5%, 56.2%, 0%, 74.9%)
CIE-LAB	lab(11.92, 10.84, -23.61)
CIE-LCH	lch(11.92, 25.98, 294.66°)
OKLab	oklab(24.49% 0.0064 -0.0674)
OKLCH	oklch(24.49% 0.068 275.5)
XYZ	xyz(1.7171, 1.3947, 5.0282)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C40 #403C18

analogous

#183040 #181C40 #281840

triadic

#181C40 #40181C #1C4018

tetradic

#181C40 #401830 #403C18 #184028

square

#181C40 #401830 #403C18 #184028

split-complementary

#181C40 #402818 #304018

monochromatic

#080A16 #080A16 #181C40 #292F6D #394399

Accessibility & contrast

On white

16.42

#181C40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181C40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C40

16.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C40	#FFFFFF	#000000	##FFFFFF
##181C40	1.00	16.42	1.28	16.42
#FFFFFF	16.42	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A2141

Deuteranopia (green-blind)

#051E3F

Tritanopia (blue-blind)

#05242A

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181c40;
/* rgb */ color: rgb(24, 28, 64);
/* oklch */ color: oklch(24.5% 0.068 275.5);

Tailwind

colors: {
  custom: {
    50: '#595775',
    500: '#181c40',
    950: '#000000',
  },
}

SCSS

$custom: #181c40;
$custom-light: #595775;
$custom-dark: #000000;

JSON

{
  "hex": "#181c40",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 64
  },
  "hsl": {
    "h": 234,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.24488,
    "c": 0.0677,
    "h": 275.5
  },
  "luminance": 0.01395
}

Semantic roles & 50–950 ramp

primary

#181C40

secondary

#77713D

accent

#C853D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181C40

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

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