#181C80#181C80

#181C80 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.1% C 0.162 H 270.5°. Best body text is #FFFFFF at 13.85:1 contrast (WCAG AA passes).

Color values

HEX	#181C80
RGB	rgb(24, 28, 128)
HSL	hsl(238, 68%, 30%)
HSV	hsv(238, 81%, 50%)
CMYK	cmyk(81.3%, 78.1%, 0%, 49.8%)
CIE-LAB	lab(18.29, 35.56, -55.83)
CIE-LCH	lch(18.29, 66.19, 302.49°)
OKLab	oklab(31.07% 0.0014 -0.1617)
OKLCH	oklch(31.07% 0.162 270.5)
XYZ	xyz(4.6869, 2.5827, 20.6694)
Luminance	0.0258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C80 #807C18

analogous

#185080 #181C80 #481880

triadic

#181C80 #80181C #1C8018

tetradic

#181C80 #801850 #807C18 #188048

square

#181C80 #801850 #807C18 #188048

split-complementary

#181C80 #804818 #508018

monochromatic

#05061A #0E114C #181C80 #2227B4 #393FDA

Accessibility & contrast

On white

13.85

#181C80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#181C80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C80

13.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C80	#FFFFFF	#000000	##FFFFFF
##181C80	1.00	13.85	1.52	13.85
#FFFFFF	13.85	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003283

Deuteranopia (green-blind)

#00277E

Tritanopia (blue-blind)

#003A4D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #181c80;
/* rgb */ color: rgb(24, 28, 128);
/* oklch */ color: oklch(31.1% 0.162 270.5);

Tailwind

colors: {
  custom: {
    50: '#6a5aa6',
    500: '#181c80',
    950: '#000000',
  },
}

SCSS

$custom: #181c80;
$custom-light: #6a5aa6;
$custom-dark: #000000;

JSON

{
  "hex": "#181c80",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 128
  },
  "hsl": {
    "h": 237.692,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31065,
    "c": 0.16169,
    "h": 270.5
  },
  "luminance": 0.02583
}

Semantic roles & 50–950 ramp

primary

#181C80

secondary

#B4B040

accent

#E53DEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #181C80

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

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