#181C66#181C66

#181C66 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.1% C 0.127 H 272.5°. Best body text is #FFFFFF at 15.03:1 contrast (WCAG AA passes).

Color values

HEX	#181C66
RGB	rgb(24, 28, 102)
HSL	hsl(237, 62%, 25%)
HSV	hsv(237, 76%, 40%)
CMYK	cmyk(76.5%, 72.5%, 0%, 60%)
CIE-LAB	lab(15.40, 25.92, -43.79)
CIE-LCH	lch(15.40, 50.89, 300.62°)
OKLab	oklab(28.14% 0.0056 -0.1266)
OKLCH	oklch(28.14% 0.127 272.5)
XYZ	xyz(3.1894, 1.9837, 12.7826)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C66 #666218

analogous

#184366 #181C66 #3B1866

triadic

#181C66 #66181C #1C6618

tetradic

#181C66 #661843 #666218 #18663B

square

#181C66 #661843 #666218 #18663B

split-complementary

#181C66 #663B18 #436618

monochromatic

#060719 #0C0E34 #181C66 #242A98 #2F37C9

Accessibility & contrast

On white

15.03

#181C66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#181C66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C66

15.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C66	#FFFFFF	#000000	##FFFFFF
##181C66	1.00	15.03	1.40	15.03
#FFFFFF	15.03	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A68

Deuteranopia (green-blind)

#002365

Tritanopia (blue-blind)

#00303E

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #181c66;
/* rgb */ color: rgb(24, 28, 102);
/* oklch */ color: oklch(28.1% 0.127 272.5);

Tailwind

colors: {
  custom: {
    50: '#625892',
    500: '#181c66',
    950: '#000000',
  },
}

SCSS

$custom: #181c66;
$custom-light: #625892;
$custom-dark: #000000;

JSON

{
  "hex": "#181c66",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 102
  },
  "hsl": {
    "h": 236.923,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.28139,
    "c": 0.12675,
    "h": 272.5
  },
  "luminance": 0.01984
}

Semantic roles & 50–950 ramp

primary

#181C66

secondary

#9C973E

accent

#DD43E5

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #181C66

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

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