#181B71#181B71

#181B71 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.2% C 0.143 H 271.8°. Best body text is #FFFFFF at 14.64:1 contrast (WCAG AA passes).

Color values

HEX	#181B71
RGB	rgb(24, 27, 113)
HSL	hsl(238, 65%, 27%)
HSV	hsv(238, 79%, 44%)
CMYK	cmyk(78.8%, 76.1%, 0%, 55.7%)
CIE-LAB	lab(16.35, 30.73, -49.40)
CIE-LCH	lch(16.35, 58.18, 301.88°)
OKLab	oklab(29.18% 0.0045 -0.143)
OKLCH	oklch(29.18% 0.143 271.8)
XYZ	xyz(3.7483, 2.1699, 15.8409)
Luminance	0.0217 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B71 #716E18

analogous

#184871 #181B71 #421871

triadic

#181B71 #71181B #1B7118

tetradic

#181B71 #711848 #716E18 #187142

square

#181B71 #711848 #716E18 #187142

split-complementary

#181B71 #714218 #487118

monochromatic

#050619 #0D0F3F #181B71 #2327A3 #3036D3

Accessibility & contrast

On white

14.64

#181B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#181B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B71

14.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B71	#FFFFFF	#000000	##FFFFFF
##181B71	1.00	14.64	1.43	14.64
#FFFFFF	14.64	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D74

Deuteranopia (green-blind)

#00246F

Tritanopia (blue-blind)

#003444

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #181b71;
/* rgb */ color: rgb(24, 27, 113);
/* oklch */ color: oklch(29.2% 0.143 271.8);

Tailwind

colors: {
  custom: {
    50: '#66589b',
    500: '#181b71',
    950: '#000000',
  },
}

SCSS

$custom: #181b71;
$custom-light: #66589b;
$custom-dark: #000000;

JSON

{
  "hex": "#181b71",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 113
  },
  "hsl": {
    "h": 237.978,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29183,
    "c": 0.14307,
    "h": 271.8
  },
  "luminance": 0.0217
}

Semantic roles & 50–950 ramp

primary

#181B71

secondary

#A6A33E

accent

#E240E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #181B71

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

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