#181C71#181C71

#181C71 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.3% C 0.142 H 271.6°. Best body text is #FFFFFF at 14.55:1 contrast (WCAG AA passes).

Color values

HEX	#181C71
RGB	rgb(24, 28, 113)
HSL	hsl(237, 65%, 27%)
HSV	hsv(237, 79%, 44%)
CMYK	cmyk(78.8%, 75.2%, 0%, 55.7%)
CIE-LAB	lab(16.59, 30.09, -49.02)
CIE-LCH	lch(16.59, 57.52, 301.54°)
OKLab	oklab(29.35% 0.004 -0.1419)
OKLCH	oklch(29.35% 0.142 271.6)
XYZ	xyz(3.7716, 2.2166, 15.8486)
Luminance	0.0222 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C71 #716D18

analogous

#184971 #181C71 #411871

triadic

#181C71 #71181C #1C7118

tetradic

#181C71 #711849 #716D18 #187141

square

#181C71 #711849 #716D18 #187141

split-complementary

#181C71 #714118 #497118

monochromatic

#050619 #0D0F3F #181C71 #2329A3 #3038D3

Accessibility & contrast

On white

14.55

#181C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#181C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C71

14.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C71	#FFFFFF	#000000	##FFFFFF
##181C71	1.00	14.55	1.44	14.55
#FFFFFF	14.55	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D74

Deuteranopia (green-blind)

#00256F

Tritanopia (blue-blind)

#003444

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #181c71;
/* rgb */ color: rgb(24, 28, 113);
/* oklch */ color: oklch(29.3% 0.142 271.6);

Tailwind

colors: {
  custom: {
    50: '#65599b',
    500: '#181c71',
    950: '#000000',
  },
}

SCSS

$custom: #181c71;
$custom-light: #65599b;
$custom-dark: #000000;

JSON

{
  "hex": "#181c71",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 113
  },
  "hsl": {
    "h": 237.303,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29347,
    "c": 0.14196,
    "h": 271.6
  },
  "luminance": 0.02217
}

Semantic roles & 50–950 ramp

primary

#181C71

secondary

#A6A23E

accent

#E040E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #181C71

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

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