#181B9E#181B9E

#181B9E is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.5% C 0.199 H 268.8°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#181B9E
RGB	rgb(24, 27, 158)
HSL	hsl(239, 74%, 36%)
HSV	hsv(239, 85%, 62%)
CMYK	cmyk(84.8%, 82.9%, 0%, 38%)
CIE-LAB	lab(21.75, 46.26, -68.77)
CIE-LCH	lch(21.75, 82.88, 303.93°)
OKLab	oklab(34.55% -0.0041 -0.1992)
OKLCH	oklch(34.55% 0.199 268.8)
XYZ	xyz(6.9381, 3.4458, 32.6406)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B9E #9E9B18

analogous

#185E9E #181B9E #58189E

triadic

#181B9E #9E181B #1B9E18

tetradic

#181B9E #9E185E #9E9B18 #189E58

square

#181B9E #9E185E #9E9B18 #189E58

split-complementary

#181B9E #9E5818 #5E9E18

monochromatic

#080934 #101269 #181B9E #2024D3 #4D50E4

Accessibility & contrast

On white

12.43

#181B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#181B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B9E

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B9E	#FFFFFF	#000000	##FFFFFF
##181B9E	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA2

Deuteranopia (green-blind)

#002D9C

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #181b9e;
/* rgb */ color: rgb(24, 27, 158);
/* oklch */ color: oklch(34.5% 0.199 268.8);

Tailwind

colors: {
  custom: {
    50: '#725bbc',
    500: '#181b9e',
    950: '#000000',
  },
}

SCSS

$custom: #181b9e;
$custom-light: #725bbc;
$custom-dark: #000000;

JSON

{
  "hex": "#181b9e",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 158
  },
  "hsl": {
    "h": 238.657,
    "s": 73.626,
    "l": 35.686
  },
  "oklch": {
    "l": 0.34546,
    "c": 0.1992,
    "h": 268.8
  },
  "luminance": 0.03447
}

Semantic roles & 50–950 ramp

primary

#181B9E

secondary

#C6C34C

accent

#EC38F0

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #181B9E

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

Preview Lab → · Contrast checker → · Palette generator →