#181F71#181F71

#181F71 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 29.9% C 0.138 H 271.0°. Best body text is #FFFFFF at 14.25:1 contrast (WCAG AA passes).

Color values

HEX	#181F71
RGB	rgb(24, 31, 113)
HSL	hsl(235, 65%, 27%)
HSV	hsv(235, 79%, 44%)
CMYK	cmyk(78.8%, 72.6%, 0%, 55.7%)
CIE-LAB	lab(17.30, 28.12, -47.84)
CIE-LCH	lch(17.30, 55.50, 300.44°)
OKLab	oklab(29.86% 0.0023 -0.1385)
OKLCH	oklch(29.86% 0.138 271)
XYZ	xyz(3.8463, 2.3660, 15.8736)
Luminance	0.0237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F71 #716A18

analogous

#184C71 #181F71 #3E1871

triadic

#181F71 #71181F #1F7118

tetradic

#181F71 #71184C #716A18 #18713E

square

#181F71 #71184C #716A18 #18713E

split-complementary

#181F71 #713E18 #4C7118

monochromatic

#050719 #0D113F #181F71 #232DA3 #303DD3

Accessibility & contrast

On white

14.25

#181F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#181F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F71

14.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F71	#FFFFFF	#000000	##FFFFFF
##181F71	1.00	14.25	1.47	14.25
#FFFFFF	14.25	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F73

Deuteranopia (green-blind)

#00266F

Tritanopia (blue-blind)

#003645

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #181f71;
/* rgb */ color: rgb(24, 31, 113);
/* oklch */ color: oklch(29.9% 0.138 271.0);

Tailwind

colors: {
  custom: {
    50: '#655b9b',
    500: '#181f71',
    950: '#000000',
  },
}

SCSS

$custom: #181f71;
$custom-light: #655b9b;
$custom-dark: #000000;

JSON

{
  "hex": "#181f71",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 113
  },
  "hsl": {
    "h": 235.281,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29863,
    "c": 0.13848,
    "h": 271
  },
  "luminance": 0.02366
}

Semantic roles & 50–950 ramp

primary

#181F71

secondary

#A69E3E

accent

#DB40E8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #181F71

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

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