#181B8D#181B8D

#181B8D is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.179 H 269.8°. Best body text is #FFFFFF at 13.29:1 contrast (WCAG AA passes).

Color values

HEX	#181B8D
RGB	rgb(24, 27, 141)
HSL	hsl(238, 71%, 32%)
HSV	hsv(238, 83%, 55%)
CMYK	cmyk(83%, 80.9%, 0%, 44.7%)
CIE-LAB	lab(19.64, 40.64, -61.77)
CIE-LCH	lch(19.64, 73.94, 303.35°)
OKLab	oklab(32.47% -0.0007 -0.1789)
OKLCH	oklch(32.47% 0.179 269.8)
XYZ	xyz(5.5747, 2.9005, 25.4602)
Luminance	0.0290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B8D #8D8A18

analogous

#18558D #181B8D #50188D

triadic

#181B8D #8D181B #1B8D18

tetradic

#181B8D #8D1855 #8D8A18 #188D50

square

#181B8D #8D1855 #8D8A18 #188D50

split-complementary

#181B8D #8D5018 #558D18

monochromatic

#060724 #0F1159 #181B8D #2125C1 #4145DF

Accessibility & contrast

On white

13.29

#181B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#181B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B8D

13.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B8D	#FFFFFF	#000000	##FFFFFF
##181B8D	1.00	13.29	1.58	13.29
#FFFFFF	13.29	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003590

Deuteranopia (green-blind)

#00298B

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #181b8d;
/* rgb */ color: rgb(24, 27, 141);
/* oklch */ color: oklch(32.5% 0.179 269.8);

Tailwind

colors: {
  custom: {
    50: '#6d5ab0',
    500: '#181b8d',
    950: '#000000',
  },
}

SCSS

$custom: #181b8d;
$custom-light: #6d5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#181b8d",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 141
  },
  "hsl": {
    "h": 238.462,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3247,
    "c": 0.17889,
    "h": 269.8
  },
  "luminance": 0.02901
}

Semantic roles & 50–950 ramp

primary

#181B8D

secondary

#BFBC42

accent

#E93AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #181B8D

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

Preview Lab → · Contrast checker → · Palette generator →