#181D8B#181D8B

#181D8B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.175 H 269.7°. Best body text is #FFFFFF at 13.23:1 contrast (WCAG AA passes).

Color values

HEX	#181D8B
RGB	rgb(24, 29, 139)
HSL	hsl(237, 71%, 32%)
HSV	hsv(237, 83%, 55%)
CMYK	cmyk(82.7%, 79.1%, 0%, 45.5%)
CIE-LAB	lab(19.79, 38.84, -60.27)
CIE-LCH	lch(19.79, 71.70, 302.80°)
OKLab	oklab(32.5% -0.0009 -0.1746)
OKLCH	oklch(32.5% 0.175 269.7)
XYZ	xyz(5.4747, 2.9364, 24.6993)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D8B #8B8618

analogous

#18578B #181D8B #4C188B

triadic

#181D8B #8B181D #1D8B18

tetradic

#181D8B #8B1857 #8B8618 #188B4C

square

#181D8B #8B1857 #8B8618 #188B4C

split-complementary

#181D8B #8B4C18 #578B18

monochromatic

#060723 #0F1257 #181D8B #2128BF #3F46DE

Accessibility & contrast

On white

13.23

#181D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#181D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D8B

13.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D8B	#FFFFFF	#000000	##FFFFFF
##181D8B	1.00	13.23	1.59	13.23
#FFFFFF	13.23	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002A89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #181d8b;
/* rgb */ color: rgb(24, 29, 139);
/* oklch */ color: oklch(32.5% 0.175 269.7);

Tailwind

colors: {
  custom: {
    50: '#6d5bae',
    500: '#181d8b',
    950: '#000000',
  },
}

SCSS

$custom: #181d8b;
$custom-light: #6d5bae;
$custom-dark: #000000;

JSON

{
  "hex": "#181d8b",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 139
  },
  "hsl": {
    "h": 237.391,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32503,
    "c": 0.17459,
    "h": 269.7
  },
  "luminance": 0.02937
}

Semantic roles & 50–950 ramp

primary

#181D8B

secondary

#BEB940

accent

#E63AED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #181D8B

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

Preview Lab → · Contrast checker → · Palette generator →