#181571#181571

#181571 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.3% C 0.149 H 272.8°. Best body text is #FFFFFF at 15.17:1 contrast (WCAG AA passes).

Color values

HEX	#181571
RGB	rgb(24, 21, 113)
HSL	hsl(242, 69%, 26%)
HSV	hsv(242, 81%, 44%)
CMYK	cmyk(78.8%, 81.4%, 0%, 55.7%)
CIE-LAB	lab(15.07, 34.35, -51.52)
CIE-LCH	lch(15.07, 61.92, 303.69°)
OKLab	oklab(28.28% 0.0072 -0.1491)
OKLCH	oklch(28.28% 0.149 272.8)
XYZ	xyz(3.6245, 1.9224, 15.7996)
Luminance	0.0192 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181571 #6E7115

analogous

#154071 #181571 #461571

triadic

#181571 #711815 #157118

tetradic

#181571 #711540 #6E7115 #157146

square

#181571 #711540 #6E7115 #157146

split-complementary

#181571 #714615 #407115

monochromatic

#05051A #0D0B3D #181571 #231FA5 #2F29D7

Accessibility & contrast

On white

15.17

#181571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#181571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181571

15.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181571	#FFFFFF	#000000	##FFFFFF
##181571	1.00	15.17	1.38	15.17
#FFFFFF	15.17	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A74

Deuteranopia (green-blind)

#00216F

Tritanopia (blue-blind)

#003143

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181571;
/* rgb */ color: rgb(24, 21, 113);
/* oklch */ color: oklch(28.3% 0.149 272.8);

Tailwind

colors: {
  custom: {
    50: '#66549b',
    500: '#181571',
    950: '#000000',
  },
}

SCSS

$custom: #181571;
$custom-light: #66549b;
$custom-dark: #000000;

JSON

{
  "hex": "#181571",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 113
  },
  "hsl": {
    "h": 241.957,
    "s": 68.657,
    "l": 26.275
  },
  "oklch": {
    "l": 0.28277,
    "c": 0.14927,
    "h": 272.8
  },
  "luminance": 0.01923
}

Semantic roles & 50–950 ramp

primary

#181571

secondary

#A4A73B

accent

#EB3CE6

background

#F6F4F9

surface

#EBE8F2

border

#C6C4CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #181571

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

Preview Lab → · Contrast checker → · Palette generator →