#151B81#151B81

#151B81 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.9% C 0.165 H 269.4°. Best body text is #FFFFFF at 13.95:1 contrast (WCAG AA passes).

Color values

HEX	#151B81
RGB	rgb(21, 27, 129)
HSL	hsl(237, 72%, 29%)
HSV	hsv(237, 84%, 51%)
CMYK	cmyk(83.7%, 79.1%, 0%, 49.4%)
CIE-LAB	lab(18.04, 36.29, -56.87)
CIE-LCH	lch(18.04, 67.46, 302.54°)
OKLab	oklab(30.88% -0.0017 -0.1647)
OKLCH	oklch(30.88% 0.165 269.4)
XYZ	xyz(4.6623, 2.5277, 21.0068)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#151B81 #817B15

analogous

#155181 #151B81 #451581

triadic

#151B81 #81151B #1B8115

tetradic

#151B81 #811551 #817B15 #158145

square

#151B81 #811551 #817B15 #158145

split-complementary

#151B81 #814515 #518115

monochromatic

#04061A #0C104C #151B81 #1E26B6 #333CDE

Accessibility & contrast

On white

13.95

#151B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#151B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #151B81

13.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##151B81	#FFFFFF	#000000	##FFFFFF
##151B81	1.00	13.95	1.51	13.95
#FFFFFF	13.95	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003184

Deuteranopia (green-blind)

#00277F

Tritanopia (blue-blind)

#003A4D

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #151b81;
/* rgb */ color: rgb(21, 27, 129);
/* oklch */ color: oklch(30.9% 0.165 269.4);

Tailwind

colors: {
  custom: {
    50: '#6959a7',
    500: '#151b81',
    950: '#000000',
  },
}

SCSS

$custom: #151b81;
$custom-light: #6959a7;
$custom-dark: #000000;

JSON

{
  "hex": "#151b81",
  "rgb": {
    "r": 21,
    "g": 27,
    "b": 129
  },
  "hsl": {
    "h": 236.667,
    "s": 72,
    "l": 29.412
  },
  "oklch": {
    "l": 0.30884,
    "c": 0.16476,
    "h": 269.4
  },
  "luminance": 0.02528
}

Semantic roles & 50–950 ramp

primary

#151B81

secondary

#B6AF3C

accent

#E539EF

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080310

muted

#7A787F

Preview Lab

Preview with #151B81

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

Preview Lab → · Contrast checker → · Palette generator →