#131B81#131B81

#131B81 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.8% C 0.165 H 268.7°. Best body text is #FFFFFF at 13.99:1 contrast (WCAG AA passes).

Color values

HEX	#131B81
RGB	rgb(19, 27, 129)
HSL	hsl(236, 74%, 29%)
HSV	hsv(236, 85%, 51%)
CMYK	cmyk(85.3%, 79.1%, 0%, 49.4%)
CIE-LAB	lab(17.95, 36.17, -57.03)
CIE-LCH	lch(17.95, 67.53, 302.38°)
OKLab	oklab(30.79% -0.0037 -0.1652)
OKLCH	oklch(30.79% 0.165 268.7)
XYZ	xyz(4.6216, 2.5067, 21.0049)
Luminance	0.0251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131B81 #817913

analogous

#135281 #131B81 #421381

triadic

#131B81 #81131B #1B8113

tetradic

#131B81 #811352 #817913 #138142

square

#131B81 #811352 #817913 #138142

split-complementary

#131B81 #814213 #528113

monochromatic

#04061B #0B104C #131B81 #1B26B6 #2E3BE0

Accessibility & contrast

On white

13.99

#131B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#131B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131B81

13.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131B81	#FFFFFF	#000000	##FFFFFF
##131B81	1.00	13.99	1.50	13.99
#FFFFFF	13.99	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003184

Deuteranopia (green-blind)

#00267F

Tritanopia (blue-blind)

#003A4D

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #131b81;
/* rgb */ color: rgb(19, 27, 129);
/* oklch */ color: oklch(30.8% 0.165 268.7);

Tailwind

colors: {
  custom: {
    50: '#6959a7',
    500: '#131b81',
    950: '#000000',
  },
}

SCSS

$custom: #131b81;
$custom-light: #6959a7;
$custom-dark: #000000;

JSON

{
  "hex": "#131b81",
  "rgb": {
    "r": 19,
    "g": 27,
    "b": 129
  },
  "hsl": {
    "h": 235.636,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30791,
    "c": 0.16529,
    "h": 268.7
  },
  "luminance": 0.02507
}

Semantic roles & 50–950 ramp

primary

#131B81

secondary

#B6AD3A

accent

#E337F1

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080310

muted

#7A787F

Preview Lab

Preview with #131B81

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

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