#181C56#181C56

#181C56 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.103 H 273.9°. Best body text is #FFFFFF at 15.68:1 contrast (WCAG AA passes).

Color values

HEX	#181C56
RGB	rgb(24, 28, 86)
HSL	hsl(236, 56%, 22%)
HSV	hsv(236, 72%, 34%)
CMYK	cmyk(72.1%, 67.4%, 0%, 66.3%)
CIE-LAB	lab(13.81, 19.65, -35.73)
CIE-LCH	lch(13.81, 40.78, 298.81°)
OKLab	oklab(26.48% 0.0071 -0.103)
OKLCH	oklch(26.48% 0.103 273.9)
XYZ	xyz(2.4711, 1.6964, 8.9995)
Luminance	0.0170 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C56 #565218

analogous

#183B56 #181C56 #331856

triadic

#181C56 #56181C #1C5618

tetradic

#181C56 #56183B #565218 #185633

square

#181C56 #56183B #565218 #185633

split-complementary

#181C56 #563318 #3B5618

monochromatic

#070818 #0B0C26 #181C56 #252C86 #333BB6

Accessibility & contrast

On white

15.68

#181C56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181C56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C56

15.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C56	#FFFFFF	#000000	##FFFFFF
##181C56	1.00	15.68	1.34	15.68
#FFFFFF	15.68	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002658

Deuteranopia (green-blind)

#002055

Tritanopia (blue-blind)

#002B36

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181c56;
/* rgb */ color: rgb(24, 28, 86);
/* oklch */ color: oklch(26.5% 0.103 273.9);

Tailwind

colors: {
  custom: {
    50: '#5e5886',
    500: '#181c56',
    950: '#000000',
  },
}

SCSS

$custom: #181c56;
$custom-light: #5e5886;
$custom-dark: #000000;

JSON

{
  "hex": "#181c56",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 86
  },
  "hsl": {
    "h": 236.129,
    "s": 56.364,
    "l": 21.569
  },
  "oklch": {
    "l": 0.26485,
    "c": 0.10326,
    "h": 273.9
  },
  "luminance": 0.01697
}

Semantic roles & 50–950 ramp

primary

#181C56

secondary

#8D883D

accent

#D648E0

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181C56

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

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