#181B47#181B47

#181B47 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.081 H 275.9°. Best body text is #FFFFFF at 16.32:1 contrast (WCAG AA passes).

Color values

HEX	#181B47
RGB	rgb(24, 27, 71)
HSL	hsl(236, 49%, 19%)
HSV	hsv(236, 66%, 28%)
CMYK	cmyk(66.2%, 62%, 0%, 72.2%)
CIE-LAB	lab(12.17, 14.39, -28.10)
CIE-LCH	lch(12.17, 31.57, 297.12°)
OKLab	oklab(24.86% 0.0083 -0.0806)
OKLCH	oklch(24.86% 0.081 275.9)
XYZ	xyz(1.9056, 1.4328, 6.1362)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B47 #474418

analogous

#183247 #181B47 #2C1847

triadic

#181B47 #47181B #1B4718

tetradic

#181B47 #471832 #474418 #18472C

square

#181B47 #471832 #474418 #18472C

split-complementary

#181B47 #472C18 #324718

monochromatic

#080917 #090A19 #181B47 #272C75 #373EA2

Accessibility & contrast

On white

16.32

#181B47 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#181B47 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B47

16.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B47	#FFFFFF	#000000	##FFFFFF
##181B47	1.00	16.32	1.29	16.32
#FFFFFF	16.32	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002249

Deuteranopia (green-blind)

#001E46

Tritanopia (blue-blind)

#00252D

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181b47;
/* rgb */ color: rgb(24, 27, 71);
/* oklch */ color: oklch(24.9% 0.081 275.9);

Tailwind

colors: {
  custom: {
    50: '#5b577b',
    500: '#181b47',
    950: '#000000',
  },
}

SCSS

$custom: #181b47;
$custom-light: #5b577b;
$custom-dark: #000000;

JSON

{
  "hex": "#181b47",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 71
  },
  "hsl": {
    "h": 236.17,
    "s": 49.474,
    "l": 18.627
  },
  "oklch": {
    "l": 0.24856,
    "c": 0.08103,
    "h": 275.9
  },
  "luminance": 0.01433
}

Semantic roles & 50–950 ramp

primary

#181B47

secondary

#7E7A3D

accent

#D04FD9

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #181B47

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

Preview Lab → · Contrast checker → · Palette generator →