#181B6A#181B6A

#181B6A is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.4% C 0.134 H 272.4°. Best body text is #FFFFFF at 14.96:1 contrast (WCAG AA passes).

Color values

HEX	#181B6A
RGB	rgb(24, 27, 106)
HSL	hsl(238, 63%, 25%)
HSV	hsv(238, 77%, 42%)
CMYK	cmyk(77.4%, 74.5%, 0%, 58.4%)
CIE-LAB	lab(15.58, 28.12, -46.12)
CIE-LCH	lch(15.58, 54.01, 301.37°)
OKLab	oklab(28.4% 0.0056 -0.1334)
OKLCH	oklch(28.4% 0.134 272.4)
XYZ	xyz(3.3693, 2.0183, 13.8449)
Luminance	0.0202 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B6A #6A6718

analogous

#18446A #181B6A #3E186A

triadic

#181B6A #6A181B #1B6A18

tetradic

#181B6A #6A1844 #6A6718 #186A3E

square

#181B6A #6A1844 #6A6718 #186A3E

split-complementary

#181B6A #6A3E18 #446A18

monochromatic

#060619 #0D0E38 #181B6A #23289C #2F34CE

Accessibility & contrast

On white

14.96

#181B6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#181B6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B6A

14.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B6A	#FFFFFF	#000000	##FFFFFF
##181B6A	1.00	14.96	1.40	14.96
#FFFFFF	14.96	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	14.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B6C

Deuteranopia (green-blind)

#002369

Tritanopia (blue-blind)

#003140

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #181b6a;
/* rgb */ color: rgb(24, 27, 106);
/* oklch */ color: oklch(28.4% 0.134 272.4);

Tailwind

colors: {
  custom: {
    50: '#645896',
    500: '#181b6a',
    950: '#000000',
  },
}

SCSS

$custom: #181b6a;
$custom-light: #645896;
$custom-dark: #000000;

JSON

{
  "hex": "#181b6a",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 106
  },
  "hsl": {
    "h": 237.805,
    "s": 63.077,
    "l": 25.49
  },
  "oklch": {
    "l": 0.28399,
    "c": 0.13354,
    "h": 272.4
  },
  "luminance": 0.02019
}

Semantic roles & 50–950 ramp

primary

#181B6A

secondary

#A09C3E

accent

#E042E6

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181B6A

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

Preview Lab → · Contrast checker → · Palette generator →