#181D8E#181D8E

#181D8E is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.178 H 269.5°. Best body text is #FFFFFF at 13.08:1 contrast (WCAG AA passes).

Color values

HEX	#181D8E
RGB	rgb(24, 29, 142)
HSL	hsl(237, 71%, 33%)
HSV	hsv(237, 83%, 56%)
CMYK	cmyk(83.1%, 79.6%, 0%, 44.3%)
CIE-LAB	lab(20.14, 39.88, -61.55)
CIE-LCH	lch(20.14, 73.34, 302.94°)
OKLab	oklab(32.86% -0.0015 -0.1783)
OKLCH	oklch(32.86% 0.178 269.5)
XYZ	xyz(5.6969, 3.0252, 25.8696)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D8E #8E8918

analogous

#18588E #181D8E #4E188E

triadic

#181D8E #8E181D #1D8E18

tetradic

#181D8E #8E1858 #8E8918 #188E4E

square

#181D8E #8E1858 #8E8918 #188E4E

split-complementary

#181D8E #8E4E18 #588E18

monochromatic

#060825 #0F125A #181D8E #2128C2 #4148DF

Accessibility & contrast

On white

13.08

#181D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#181D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D8E

13.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D8E	#FFFFFF	#000000	##FFFFFF
##181D8E	1.00	13.08	1.61	13.08
#FFFFFF	13.08	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003791

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #181d8e;
/* rgb */ color: rgb(24, 29, 142);
/* oklch */ color: oklch(32.9% 0.178 269.5);

Tailwind

colors: {
  custom: {
    50: '#6d5bb0',
    500: '#181d8e',
    950: '#000000',
  },
}

SCSS

$custom: #181d8e;
$custom-light: #6d5bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#181d8e",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 142
  },
  "hsl": {
    "h": 237.458,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32859,
    "c": 0.17831,
    "h": 269.5
  },
  "luminance": 0.03026
}

Semantic roles & 50–950 ramp

primary

#181D8E

secondary

#C0BA42

accent

#E63AEE

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #181D8E

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

Preview Lab → · Contrast checker → · Palette generator →