#181D8C#181D8C

#181D8C is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.6% C 0.176 H 269.6°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#181D8C
RGB	rgb(24, 29, 140)
HSL	hsl(237, 71%, 32%)
HSV	hsv(237, 83%, 55%)
CMYK	cmyk(82.9%, 79.3%, 0%, 45.1%)
CIE-LAB	lab(19.91, 39.19, -60.70)
CIE-LCH	lch(19.91, 72.25, 302.85°)
OKLab	oklab(32.62% -0.0011 -0.1758)
OKLCH	oklch(32.62% 0.176 269.6)
XYZ	xyz(5.5481, 2.9657, 25.0859)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D8C #8C8718

analogous

#18578C #181D8C #4D188C

triadic

#181D8C #8C181D #1D8C18

tetradic

#181D8C #8C1857 #8C8718 #188C4D

square

#181D8C #8C1857 #8C8718 #188C4D

split-complementary

#181D8C #8C4D18 #578C18

monochromatic

#060724 #0F1258 #181D8C #2128C0 #4047DE

Accessibility & contrast

On white

13.18

#181D8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#181D8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D8C

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D8C	#FFFFFF	#000000	##FFFFFF
##181D8C	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368F

Deuteranopia (green-blind)

#002A8A

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #181d8c;
/* rgb */ color: rgb(24, 29, 140);
/* oklch */ color: oklch(32.6% 0.176 269.6);

Tailwind

colors: {
  custom: {
    50: '#6d5baf',
    500: '#181d8c',
    950: '#000000',
  },
}

SCSS

$custom: #181d8c;
$custom-light: #6d5baf;
$custom-dark: #000000;

JSON

{
  "hex": "#181d8c",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 140
  },
  "hsl": {
    "h": 237.414,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32622,
    "c": 0.17583,
    "h": 269.6
  },
  "luminance": 0.02966
}

Semantic roles & 50–950 ramp

primary

#181D8C

secondary

#BFB941

accent

#E63AED

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #181D8C

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

Preview Lab → · Contrast checker → · Palette generator →