#181557#181557

#181557 is a dark, moderate blue. Relative luminance 0.014; OKLCH L 25.3% C 0.114 H 276.5°. Best body text is #FFFFFF at 16.36:1 contrast (WCAG AA passes).

Color values

HEX	#181557
RGB	rgb(24, 21, 87)
HSL	hsl(243, 61%, 21%)
HSV	hsv(243, 76%, 34%)
CMYK	cmyk(72.4%, 75.9%, 0%, 65.9%)
CIE-LAB	lab(12.08, 24.93, -39.23)
CIE-LCH	lch(12.08, 46.49, 302.43°)
OKLab	oklab(25.26% 0.0128 -0.1133)
OKLCH	oklch(25.26% 0.114 276.5)
XYZ	xyz(2.3646, 1.4184, 9.1641)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181557 #545715

analogous

#153357 #181557 #391557

triadic

#181557 #571815 #155718

tetradic

#181557 #571533 #545715 #155739

square

#181557 #571533 #545715 #155739

split-complementary

#181557 #573915 #335715

monochromatic

#070619 #0A0926 #181557 #262188 #332DBA

Accessibility & contrast

On white

16.36

#181557 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181557 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181557

16.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181557	#FFFFFF	#000000	##FFFFFF
##181557	1.00	16.36	1.28	16.36
#FFFFFF	16.36	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002259

Deuteranopia (green-blind)

#001D56

Tritanopia (blue-blind)

#002734

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181557;
/* rgb */ color: rgb(24, 21, 87);
/* oklch */ color: oklch(25.3% 0.114 276.5);

Tailwind

colors: {
  custom: {
    50: '#5f5387',
    500: '#181557',
    950: '#000000',
  },
}

SCSS

$custom: #181557;
$custom-light: #5f5387;
$custom-dark: #000000;

JSON

{
  "hex": "#181557",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 87
  },
  "hsl": {
    "h": 242.727,
    "s": 61.111,
    "l": 21.176
  },
  "oklch": {
    "l": 0.25263,
    "c": 0.11403,
    "h": 276.5
  },
  "luminance": 0.01419
}

Semantic roles & 50–950 ramp

primary

#181557

secondary

#8B8F39

accent

#E444DD

background

#F5F4F8

surface

#EAE7F0

border

#C6C3CB

text

#05020B

muted

#79787C

Preview Lab

Preview with #181557

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

Preview Lab → · Contrast checker → · Palette generator →