#181581#181581

#181581 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.2% C 0.169 H 271.2°. Best body text is #FFFFFF at 14.35:1 contrast (WCAG AA passes).

Color values

HEX	#181581
RGB	rgb(24, 21, 129)
HSL	hsl(242, 72%, 29%)
HSV	hsv(242, 84%, 51%)
CMYK	cmyk(81.4%, 83.7%, 0%, 49.4%)
CIE-LAB	lab(17.06, 39.79, -58.50)
CIE-LCH	lch(17.06, 70.75, 304.22°)
OKLab	oklab(30.24% 0.0035 -0.1693)
OKLCH	oklch(30.24% 0.169 271.2)
XYZ	xyz(4.6060, 2.3150, 20.9687)
Luminance	0.0232 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181581 #7E8115

analogous

#154881 #181581 #4E1581

triadic

#181581 #811815 #158118

tetradic

#181581 #811548 #7E8115 #15814E

square

#181581 #811548 #7E8115 #15814E

split-complementary

#181581 #814E15 #488115

monochromatic

#05041A #0E0C4C #181581 #221EB6 #3733DE

Accessibility & contrast

On white

14.35

#181581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#181581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181581

14.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181581	#FFFFFF	#000000	##FFFFFF
##181581	1.00	14.35	1.46	14.35
#FFFFFF	14.35	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F84

Deuteranopia (green-blind)

#00247F

Tritanopia (blue-blind)

#00374C

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #181581;
/* rgb */ color: rgb(24, 21, 129);
/* oklch */ color: oklch(30.2% 0.169 271.2);

Tailwind

colors: {
  custom: {
    50: '#6b55a7',
    500: '#181581',
    950: '#000000',
  },
}

SCSS

$custom: #181581;
$custom-light: #6b55a7;
$custom-dark: #000000;

JSON

{
  "hex": "#181581",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 129
  },
  "hsl": {
    "h": 241.667,
    "s": 72,
    "l": 29.412
  },
  "oklch": {
    "l": 0.30239,
    "c": 0.16935,
    "h": 271.2
  },
  "luminance": 0.02316
}

Semantic roles & 50–950 ramp

primary

#181581

secondary

#B2B63C

accent

#EF39EA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #181581

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

Preview Lab → · Contrast checker → · Palette generator →