#143F81#143F81

#143F81 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 37.9% C 0.121 H 259.2°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#143F81
RGB	rgb(20, 63, 129)
HSL	hsl(216, 73%, 29%)
HSV	hsv(216, 84%, 51%)
CMYK	cmyk(84.5%, 51.2%, 0%, 49.4%)
CIE-LAB	lab(27.54, 11.71, -41.34)
CIE-LCH	lch(27.54, 42.96, 285.82°)
OKLab	oklab(37.91% -0.0228 -0.119)
OKLCH	oklch(37.91% 0.121 259.2)
XYZ	xyz(6.0270, 5.2880, 21.4677)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143F81 #815614

analogous

#147681 #143F81 #201481

triadic

#143F81 #81143F #3F8114

tetradic

#143F81 #811476 #815614 #148120

square

#143F81 #811476 #815614 #148120

split-complementary

#143F81 #812014 #768114

monochromatic

#040D1A #0C254C #143F81 #1C59B6 #3075DF

Accessibility & contrast

On white

10.21

#143F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#143F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143F81

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143F81	#FFFFFF	#000000	##FFFFFF
##143F81	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174683

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #143f81;
/* rgb */ color: rgb(20, 63, 129);
/* oklch */ color: oklch(37.9% 0.121 259.2);

Tailwind

colors: {
  custom: {
    50: '#6673a6',
    500: '#143f81',
    950: '#000000',
  },
}

SCSS

$custom: #143f81;
$custom-light: #6673a6;
$custom-dark: #000000;

JSON

{
  "hex": "#143f81",
  "rgb": {
    "r": 20,
    "g": 63,
    "b": 129
  },
  "hsl": {
    "h": 216.33,
    "s": 73.154,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37907,
    "c": 0.12113,
    "h": 259.2
  },
  "luminance": 0.05289
}

Semantic roles & 50–950 ramp

primary

#143F81

secondary

#B6853B

accent

#A738F0

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #143F81

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

Preview Lab → · Contrast checker → · Palette generator →