#181B66#181B66

#181B66 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.0% C 0.128 H 272.8°. Best body text is #FFFFFF at 15.14:1 contrast (WCAG AA passes).

Color values

HEX	#181B66
RGB	rgb(24, 27, 102)
HSL	hsl(238, 62%, 25%)
HSV	hsv(238, 76%, 40%)
CMYK	cmyk(76.5%, 73.5%, 0%, 60%)
CIE-LAB	lab(15.15, 26.60, -44.20)
CIE-LCH	lch(15.15, 51.58, 301.04°)
OKLab	oklab(27.96% 0.0062 -0.1278)
OKLCH	oklch(27.96% 0.128 272.8)
XYZ	xyz(3.1661, 1.9370, 12.7748)
Luminance	0.0194 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B66 #666318

analogous

#184266 #181B66 #3C1866

triadic

#181B66 #66181B #1B6618

tetradic

#181B66 #661842 #666318 #18663C

square

#181B66 #661842 #666318 #18663C

split-complementary

#181B66 #663C18 #426618

monochromatic

#060719 #0C0E34 #181B66 #242898 #2F35C9

Accessibility & contrast

On white

15.14

#181B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#181B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B66

15.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B66	#FFFFFF	#000000	##FFFFFF
##181B66	1.00	15.14	1.39	15.14
#FFFFFF	15.14	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A68

Deuteranopia (green-blind)

#002265

Tritanopia (blue-blind)

#00303E

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181b66;
/* rgb */ color: rgb(24, 27, 102);
/* oklch */ color: oklch(28.0% 0.128 272.8);

Tailwind

colors: {
  custom: {
    50: '#635892',
    500: '#181b66',
    950: '#000000',
  },
}

SCSS

$custom: #181b66;
$custom-light: #635892;
$custom-dark: #000000;

JSON

{
  "hex": "#181b66",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 102
  },
  "hsl": {
    "h": 237.692,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.2796,
    "c": 0.12797,
    "h": 272.8
  },
  "luminance": 0.01937
}

Semantic roles & 50–950 ramp

primary

#181B66

secondary

#9C983E

accent

#DF43E5

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181B66

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

Preview Lab → · Contrast checker → · Palette generator →