#131B4B#131B4B

#131B4B is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.089 H 271.2°. Best body text is #FFFFFF at 16.33:1 contrast (WCAG AA passes).

Color values

HEX	#131B4B
RGB	rgb(19, 27, 75)
HSL	hsl(231, 60%, 18%)
HSV	hsv(231, 75%, 29%)
CMYK	cmyk(74.7%, 64%, 0%, 70.6%)
CIE-LAB	lab(12.16, 15.05, -30.92)
CIE-LCH	lch(12.16, 34.39, 295.95°)
OKLab	oklab(24.86% 0.0019 -0.089)
OKLCH	oklch(24.86% 0.089 271.2)
XYZ	xyz(1.9301, 1.4301, 6.8296)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131B4B #4B4313

analogous

#13374B #131B4B #27134B

triadic

#131B4B #4B131B #1B4B13

tetradic

#131B4B #4B1337 #4B4313 #134B27

square

#131B4B #4B1337 #4B4313 #134B27

split-complementary

#131B4B #4B2713 #374B13

monochromatic

#060918 #07091A #131B4B #1F2D7C #2C3EAD

Accessibility & contrast

On white

16.33

#131B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#131B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131B4B

16.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131B4B	#FFFFFF	#000000	##FFFFFF
##131B4B	1.00	16.33	1.29	16.33
#FFFFFF	16.33	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00224D

Deuteranopia (green-blind)

#001D4A

Tritanopia (blue-blind)

#002730

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #131b4b;
/* rgb */ color: rgb(19, 27, 75);
/* oklch */ color: oklch(24.9% 0.089 271.2);

Tailwind

colors: {
  custom: {
    50: '#59577e',
    500: '#131b4b',
    950: '#000000',
  },
}

SCSS

$custom: #131b4b;
$custom-light: #59577e;
$custom-dark: #000000;

JSON

{
  "hex": "#131b4b",
  "rgb": {
    "r": 19,
    "g": 27,
    "b": 75
  },
  "hsl": {
    "h": 231.429,
    "s": 59.574,
    "l": 18.431
  },
  "oklch": {
    "l": 0.24856,
    "c": 0.08906,
    "h": 271.2
  },
  "luminance": 0.0143
}

Semantic roles & 50–950 ramp

primary

#131B4B

secondary

#847936

accent

#CC45E3

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #131B4B

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

Preview Lab → · Contrast checker → · Palette generator →