#181D71#181D71

#181D71 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.5% C 0.141 H 271.4°. Best body text is #FFFFFF at 14.45:1 contrast (WCAG AA passes).

Color values

HEX	#181D71
RGB	rgb(24, 29, 113)
HSL	hsl(237, 65%, 27%)
HSV	hsv(237, 79%, 44%)
CMYK	cmyk(78.8%, 74.3%, 0%, 55.7%)
CIE-LAB	lab(16.82, 29.44, -48.64)
CIE-LCH	lch(16.82, 56.85, 301.19°)
OKLab	oklab(29.52% 0.0034 -0.1408)
OKLCH	oklch(29.52% 0.141 271.4)
XYZ	xyz(3.7957, 2.2648, 15.8567)
Luminance	0.0226 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D71 #716C18

analogous

#184A71 #181D71 #401871

triadic

#181D71 #71181D #1D7118

tetradic

#181D71 #71184A #716C18 #187140

square

#181D71 #71184A #716C18 #187140

split-complementary

#181D71 #714018 #4A7118

monochromatic

#050619 #0D103F #181D71 #232AA3 #3039D3

Accessibility & contrast

On white

14.45

#181D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#181D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D71

14.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D71	#FFFFFF	#000000	##FFFFFF
##181D71	1.00	14.45	1.45	14.45
#FFFFFF	14.45	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E74

Deuteranopia (green-blind)

#00256F

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #181d71;
/* rgb */ color: rgb(24, 29, 113);
/* oklch */ color: oklch(29.5% 0.141 271.4);

Tailwind

colors: {
  custom: {
    50: '#65599b',
    500: '#181d71',
    950: '#000000',
  },
}

SCSS

$custom: #181d71;
$custom-light: #65599b;
$custom-dark: #000000;

JSON

{
  "hex": "#181d71",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 113
  },
  "hsl": {
    "h": 236.629,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29515,
    "c": 0.14082,
    "h": 271.4
  },
  "luminance": 0.02265
}

Semantic roles & 50–950 ramp

primary

#181D71

secondary

#A6A13E

accent

#DE40E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #181D71

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

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