#181556#181556

#181556 is a dark, moderate blue. Relative luminance 0.014; OKLCH L 25.2% C 0.113 H 276.6°. Best body text is #FFFFFF at 16.40:1 contrast (WCAG AA passes).

Color values

HEX	#181556
RGB	rgb(24, 21, 86)
HSL	hsl(243, 61%, 21%)
HSV	hsv(243, 76%, 34%)
CMYK	cmyk(72.1%, 75.6%, 0%, 66.3%)
CIE-LAB	lab(11.97, 24.55, -38.73)
CIE-LCH	lch(11.97, 45.86, 302.37°)
OKLab	oklab(25.15% 0.013 -0.1118)
OKLCH	oklch(25.15% 0.113 276.6)
XYZ	xyz(2.3240, 1.4022, 8.9505)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181556 #535615

analogous

#153256 #181556 #381556

triadic

#181556 #561815 #155618

tetradic

#181556 #561532 #535615 #155638

square

#181556 #561532 #535615 #155638

split-complementary

#181556 #563815 #325615

monochromatic

#070619 #0A0925 #181556 #262187 #332DB8

Accessibility & contrast

On white

16.40

#181556 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181556 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181556

16.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181556	#FFFFFF	#000000	##FFFFFF
##181556	1.00	16.40	1.28	16.40
#FFFFFF	16.40	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002258

Deuteranopia (green-blind)

#001D55

Tritanopia (blue-blind)

#002733

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181556;
/* rgb */ color: rgb(24, 21, 86);
/* oklch */ color: oklch(25.2% 0.113 276.6);

Tailwind

colors: {
  custom: {
    50: '#5f5386',
    500: '#181556',
    950: '#000000',
  },
}

SCSS

$custom: #181556;
$custom-light: #5f5386;
$custom-dark: #000000;

JSON

{
  "hex": "#181556",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 86
  },
  "hsl": {
    "h": 242.769,
    "s": 60.748,
    "l": 20.98
  },
  "oklch": {
    "l": 0.25153,
    "c": 0.1126,
    "h": 276.6
  },
  "luminance": 0.01402
}

Semantic roles & 50–950 ramp

primary

#181556

secondary

#8A8E39

accent

#E444DC

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #181556

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

Preview Lab → · Contrast checker → · Palette generator →