#181558#181558

#181558 is a dark, moderate blue. Relative luminance 0.014; OKLCH L 25.4% C 0.115 H 276.3°. Best body text is #FFFFFF at 16.32:1 contrast (WCAG AA passes).

Color values

HEX	#181558
RGB	rgb(24, 21, 88)
HSL	hsl(243, 61%, 21%)
HSV	hsv(243, 76%, 35%)
CMYK	cmyk(72.7%, 76.1%, 0%, 65.5%)
CIE-LAB	lab(12.19, 25.30, -39.73)
CIE-LCH	lch(12.19, 47.11, 302.49°)
OKLab	oklab(25.37% 0.0126 -0.1148)
OKLCH	oklch(25.37% 0.115 276.3)
XYZ	xyz(2.4057, 1.4349, 9.3808)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181558 #555815

analogous

#153458 #181558 #3A1558

triadic

#181558 #581815 #155818

tetradic

#181558 #581534 #555815 #15583A

square

#181558 #581534 #555815 #15583A

split-complementary

#181558 #583A15 #345815

monochromatic

#070619 #0B0927 #181558 #252189 #332DBB

Accessibility & contrast

On white

16.32

#181558 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#181558 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181558

16.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181558	#FFFFFF	#000000	##FFFFFF
##181558	1.00	16.32	1.29	16.32
#FFFFFF	16.32	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00235A

Deuteranopia (green-blind)

#001D57

Tritanopia (blue-blind)

#002734

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181558;
/* rgb */ color: rgb(24, 21, 88);
/* oklch */ color: oklch(25.4% 0.115 276.3);

Tailwind

colors: {
  custom: {
    50: '#5f5388',
    500: '#181558',
    950: '#000000',
  },
}

SCSS

$custom: #181558;
$custom-light: #5f5388;
$custom-dark: #000000;

JSON

{
  "hex": "#181558",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 88
  },
  "hsl": {
    "h": 242.687,
    "s": 61.468,
    "l": 21.373
  },
  "oklch": {
    "l": 0.25373,
    "c": 0.11546,
    "h": 276.3
  },
  "luminance": 0.01435
}

Semantic roles & 50–950 ramp

primary

#181558

secondary

#8C9039

accent

#E543DD

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05020B

muted

#79787C

Preview Lab

Preview with #181558

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

Preview Lab → · Contrast checker → · Palette generator →