#181B42#181B42

#181B42 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.4% C 0.073 H 276.3°. Best body text is #FFFFFF at 16.48:1 contrast (WCAG AA passes).

Color values

HEX	#181B42
RGB	rgb(24, 27, 66)
HSL	hsl(236, 47%, 18%)
HSV	hsv(236, 64%, 26%)
CMYK	cmyk(63.6%, 59.1%, 0%, 74.1%)
CIE-LAB	lab(11.77, 12.39, -25.27)
CIE-LCH	lch(11.77, 28.15, 296.13°)
OKLab	oklab(24.42% 0.008 -0.0723)
OKLCH	oklch(24.42% 0.073 276.3)
XYZ	xyz(1.7517, 1.3713, 5.3256)
Luminance	0.0137 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B42 #423F18

analogous

#183042 #181B42 #2A1842

triadic

#181B42 #42181B #1B4218

tetradic

#181B42 #421830 #423F18 #18422A

square

#181B42 #421830 #423F18 #18422A

split-complementary

#181B42 #422A18 #304218

monochromatic

#080916 #080916 #181B42 #282D6F #39409C

Accessibility & contrast

On white

16.48

#181B42 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181B42 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B42

16.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B42	#FFFFFF	#000000	##FFFFFF
##181B42	1.00	16.48	1.27	16.48
#FFFFFF	16.48	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#062143

Deuteranopia (green-blind)

#011D41

Tritanopia (blue-blind)

#03242B

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181b42;
/* rgb */ color: rgb(24, 27, 66);
/* oklch */ color: oklch(24.4% 0.073 276.3);

Tailwind

colors: {
  custom: {
    50: '#595777',
    500: '#181b42',
    950: '#000000',
  },
}

SCSS

$custom: #181b42;
$custom-light: #595777;
$custom-dark: #000000;

JSON

{
  "hex": "#181b42",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 66
  },
  "hsl": {
    "h": 235.714,
    "s": 46.667,
    "l": 17.647
  },
  "oklch": {
    "l": 0.24419,
    "c": 0.07272,
    "h": 276.3
  },
  "luminance": 0.01371
}

Semantic roles & 50–950 ramp

primary

#181B42

secondary

#79743D

accent

#CD51D6

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181B42

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

Preview Lab → · Contrast checker → · Palette generator →