#181F4B#181F4B

#181F4B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.1% C 0.081 H 272.7°. Best body text is #FFFFFF at 15.71:1 contrast (WCAG AA passes).

Color values

HEX	#181F4B
RGB	rgb(24, 31, 75)
HSL	hsl(232, 52%, 19%)
HSV	hsv(232, 68%, 29%)
CMYK	cmyk(68%, 58.7%, 0%, 70.6%)
CIE-LAB	lab(13.72, 13.00, -28.37)
CIE-LCH	lch(13.72, 31.20, 294.62°)
OKLab	oklab(26.12% 0.0038 -0.0813)
OKLCH	oklch(26.12% 0.081 272.7)
XYZ	xyz(2.1363, 1.6820, 6.8673)
Luminance	0.0168 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F4B #4B4418

analogous

#18394B #181F4B #2B184B

triadic

#181F4B #4B181F #1F4B18

tetradic

#181F4B #4B1839 #4B4418 #184B2B

square

#181F4B #4B1839 #4B4418 #184B2B

split-complementary

#181F4B #4B2B18 #394B18

monochromatic

#070A17 #090C1D #181F4B #273279 #3645A8

Accessibility & contrast

On white

15.71

#181F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F4B

15.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F4B	#FFFFFF	#000000	##FFFFFF
##181F4B	1.00	15.71	1.34	15.71
#FFFFFF	15.71	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05254D

Deuteranopia (green-blind)

#00214A

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181f4b;
/* rgb */ color: rgb(24, 31, 75);
/* oklch */ color: oklch(26.1% 0.081 272.7);

Tailwind

colors: {
  custom: {
    50: '#5b5a7e',
    500: '#181f4b',
    950: '#000000',
  },
}

SCSS

$custom: #181f4b;
$custom-light: #5b5a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#181f4b",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 75
  },
  "hsl": {
    "h": 231.765,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.2612,
    "c": 0.08143,
    "h": 272.7
  },
  "luminance": 0.01682
}

Semantic roles & 50–950 ramp

primary

#181F4B

secondary

#82783D

accent

#C74DDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181F4B

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

Preview Lab → · Contrast checker → · Palette generator →