#181F4A#181F4A

#181F4A is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.0% C 0.080 H 272.7°. Best body text is #FFFFFF at 15.74:1 contrast (WCAG AA passes).

Color values

HEX	#181F4A
RGB	rgb(24, 31, 74)
HSL	hsl(232, 51%, 19%)
HSV	hsv(232, 68%, 29%)
CMYK	cmyk(67.6%, 58.1%, 0%, 71%)
CIE-LAB	lab(13.64, 12.59, -27.81)
CIE-LCH	lch(13.64, 30.53, 294.36°)
OKLab	oklab(26.03% 0.0037 -0.0797)
OKLCH	oklch(26.03% 0.08 272.7)
XYZ	xyz(2.1023, 1.6684, 6.6885)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F4A #4A4318

analogous

#18384A #181F4A #2A184A

triadic

#181F4A #4A181F #1F4A18

tetradic

#181F4A #4A1838 #4A4318 #184A2A

square

#181F4A #4A1838 #4A4318 #184A2A

split-complementary

#181F4A #4A2A18 #384A18

monochromatic

#070A17 #090C1C #181F4A #273278 #3646A6

Accessibility & contrast

On white

15.74

#181F4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#181F4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F4A

15.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F4A	#FFFFFF	#000000	##FFFFFF
##181F4A	1.00	15.74	1.33	15.74
#FFFFFF	15.74	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06254C

Deuteranopia (green-blind)

#002149

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181f4a;
/* rgb */ color: rgb(24, 31, 74);
/* oklch */ color: oklch(26.0% 0.080 272.7);

Tailwind

colors: {
  custom: {
    50: '#5b5a7d',
    500: '#181f4a',
    950: '#000000',
  },
}

SCSS

$custom: #181f4a;
$custom-light: #5b5a7d;
$custom-dark: #000000;

JSON

{
  "hex": "#181f4a",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 74
  },
  "hsl": {
    "h": 231.6,
    "s": 51.02,
    "l": 19.216
  },
  "oklch": {
    "l": 0.26034,
    "c": 0.07979,
    "h": 272.7
  },
  "luminance": 0.01669
}

Semantic roles & 50–950 ramp

primary

#181F4A

secondary

#81773D

accent

#C74DDA

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #181F4A

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

Preview Lab → · Contrast checker → · Palette generator →