#101581#101581

#101581 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.8% C 0.172 H 268.2°. Best body text is #FFFFFF at 14.52:1 contrast (WCAG AA passes).

Color values

HEX	#101581
RGB	rgb(16, 21, 129)
HSL	hsl(237, 78%, 28%)
HSV	hsv(237, 88%, 51%)
CMYK	cmyk(87.6%, 83.7%, 0%, 49.4%)
CIE-LAB	lab(16.66, 39.36, -59.18)
CIE-LCH	lch(16.66, 71.07, 303.63°)
OKLab	oklab(29.85% -0.0052 -0.1714)
OKLCH	oklch(29.85% 0.172 268.2)
XYZ	xyz(4.4429, 2.2309, 20.9611)
Luminance	0.0223 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101581 #817C10

analogous

#104D81 #101581 #431081

triadic

#101581 #811015 #158110

tetradic

#101581 #81104D #817C10 #108143

square

#101581 #81104D #817C10 #108143

split-complementary

#101581 #814310 #4D8110

monochromatic

#03041B #090C4B #101581 #171EB7 #2730E4

Accessibility & contrast

On white

14.52

#101581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#101581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101581

14.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101581	#FFFFFF	#000000	##FFFFFF
##101581	1.00	14.52	1.45	14.52
#FFFFFF	14.52	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F84

Deuteranopia (green-blind)

#00237F

Tritanopia (blue-blind)

#00384C

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #101581;
/* rgb */ color: rgb(16, 21, 129);
/* oklch */ color: oklch(29.8% 0.172 268.2);

Tailwind

colors: {
  custom: {
    50: '#6955a7',
    500: '#101581',
    950: '#000000',
  },
}

SCSS

$custom: #101581;
$custom-light: #6955a7;
$custom-dark: #000000;

JSON

{
  "hex": "#101581",
  "rgb": {
    "r": 16,
    "g": 21,
    "b": 129
  },
  "hsl": {
    "h": 237.345,
    "s": 77.931,
    "l": 28.431
  },
  "oklch": {
    "l": 0.29846,
    "c": 0.1715,
    "h": 268.2
  },
  "luminance": 0.02231
}

Semantic roles & 50–950 ramp

primary

#101581

secondary

#B7B136

accent

#EC33F4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080310

muted

#7A787F

Preview Lab

Preview with #101581

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

Preview Lab → · Contrast checker → · Palette generator →