#181553#181553

#181553 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.8% C 0.108 H 277.2°. Best body text is #FFFFFF at 16.52:1 contrast (WCAG AA passes).

Color values

HEX	#181553
RGB	rgb(24, 21, 83)
HSL	hsl(243, 60%, 20%)
HSV	hsv(243, 75%, 33%)
CMYK	cmyk(71.1%, 74.7%, 0%, 67.5%)
CIE-LAB	lab(11.65, 23.42, -37.21)
CIE-LCH	lch(11.65, 43.97, 302.18°)
OKLab	oklab(24.83% 0.0135 -0.1074)
OKLCH	oklch(24.83% 0.108 277.2)
XYZ	xyz(2.2057, 1.3549, 8.3272)
Luminance	0.0135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181553 #505315

analogous

#153153 #181553 #371553

triadic

#181553 #531815 #155318

tetradic

#181553 #531531 #505315 #155337

square

#181553 #531531 #505315 #155337

split-complementary

#181553 #533715 #315315

monochromatic

#070618 #0A0922 #181553 #262184 #342EB5

Accessibility & contrast

On white

16.52

#181553 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181553 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181553

16.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181553	#FFFFFF	#000000	##FFFFFF
##181553	1.00	16.52	1.27	16.52
#FFFFFF	16.52	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002155

Deuteranopia (green-blind)

#001C52

Tritanopia (blue-blind)

#002632

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181553;
/* rgb */ color: rgb(24, 21, 83);
/* oklch */ color: oklch(24.8% 0.108 277.2);

Tailwind

colors: {
  custom: {
    50: '#5e5384',
    500: '#181553',
    950: '#000000',
  },
}

SCSS

$custom: #181553;
$custom-light: #5e5384;
$custom-dark: #000000;

JSON

{
  "hex": "#181553",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 83
  },
  "hsl": {
    "h": 242.903,
    "s": 59.615,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24827,
    "c": 0.10826,
    "h": 277.2
  },
  "luminance": 0.01355
}

Semantic roles & 50–950 ramp

primary

#181553

secondary

#878B39

accent

#E345DB

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #181553

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

Preview Lab → · Contrast checker → · Palette generator →