#143D81#143D81

#143D81 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.4% C 0.124 H 260.1°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#143D81
RGB	rgb(20, 61, 129)
HSL	hsl(217, 73%, 29%)
HSV	hsv(217, 84%, 51%)
CMYK	cmyk(84.5%, 52.7%, 0%, 49.4%)
CIE-LAB	lab(26.93, 13.11, -42.31)
CIE-LCH	lch(26.93, 44.30, 287.22°)
OKLab	oklab(37.44% -0.0212 -0.1219)
OKLCH	oklch(37.44% 0.124 260.1)
XYZ	xyz(5.9182, 5.0705, 21.4314)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143D81 #815814

analogous

#147481 #143D81 #221481

triadic

#143D81 #81143D #3D8114

tetradic

#143D81 #811474 #815814 #148122

square

#143D81 #811474 #815814 #148122

split-complementary

#143D81 #812214 #748114

monochromatic

#040D1A #0C244C #143D81 #1C56B6 #3072DF

Accessibility & contrast

On white

10.43

#143D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#143D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143D81

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143D81	#FFFFFF	#000000	##FFFFFF
##143D81	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104583

Deuteranopia (green-blind)

#003B80

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #143d81;
/* rgb */ color: rgb(20, 61, 129);
/* oklch */ color: oklch(37.4% 0.124 260.1);

Tailwind

colors: {
  custom: {
    50: '#6671a6',
    500: '#143d81',
    950: '#000000',
  },
}

SCSS

$custom: #143d81;
$custom-light: #6671a6;
$custom-dark: #000000;

JSON

{
  "hex": "#143d81",
  "rgb": {
    "r": 20,
    "g": 61,
    "b": 129
  },
  "hsl": {
    "h": 217.431,
    "s": 73.154,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37443,
    "c": 0.12372,
    "h": 260.1
  },
  "luminance": 0.05071
}

Semantic roles & 50–950 ramp

primary

#143D81

secondary

#B6883B

accent

#AB38F0

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #143D81

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

Preview Lab → · Contrast checker → · Palette generator →