#143D8C#143D8C

#143D8C is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.139 H 261.8°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#143D8C
RGB	rgb(20, 61, 140)
HSL	hsl(220, 75%, 31%)
HSV	hsv(220, 86%, 55%)
CMYK	cmyk(85.7%, 56.4%, 0%, 45.1%)
CIE-LAB	lab(27.79, 17.69, -47.77)
CIE-LCH	lch(27.79, 50.94, 290.32°)
OKLab	oklab(38.36% -0.0199 -0.1379)
OKLCH	oklch(38.36% 0.139 261.8)
XYZ	xyz(6.6891, 5.3788, 25.4915)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143D8C #8C6314

analogous

#14798C #143D8C #27148C

triadic

#143D8C #8C143D #3D8C14

tetradic

#143D8C #8C1479 #8C6314 #148C27

square

#143D8C #8C1479 #8C6314 #148C27

split-complementary

#143D8C #8C2714 #798C14

monochromatic

#050E21 #0C2656 #143D8C #1C54C2 #3872E3

Accessibility & contrast

On white

10.12

#143D8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#143D8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143D8C

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143D8C	#FFFFFF	#000000	##FFFFFF
##143D8C	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478F

Deuteranopia (green-blind)

#003C8A

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #143d8c;
/* rgb */ color: rgb(20, 61, 140);
/* oklch */ color: oklch(38.4% 0.139 261.8);

Tailwind

colors: {
  custom: {
    50: '#6971ae',
    500: '#143d8c',
    950: '#000000',
  },
}

SCSS

$custom: #143d8c;
$custom-light: #6971ae;
$custom-dark: #000000;

JSON

{
  "hex": "#143d8c",
  "rgb": {
    "r": 20,
    "g": 61,
    "b": 140
  },
  "hsl": {
    "h": 219.5,
    "s": 75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38362,
    "c": 0.13937,
    "h": 261.8
  },
  "luminance": 0.0538
}

Semantic roles & 50–950 ramp

primary

#143D8C

secondary

#C0933C

accent

#B236F2

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #143D8C

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

Preview Lab → · Contrast checker → · Palette generator →