#143C8B#143C8B

#143C8B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.1% C 0.139 H 262.0°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#143C8B
RGB	rgb(20, 60, 139)
HSL	hsl(220, 75%, 31%)
HSV	hsv(220, 86%, 55%)
CMYK	cmyk(85.6%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(27.42, 17.98, -47.75)
CIE-LCH	lch(27.42, 51.02, 290.63°)
OKLab	oklab(38.06% -0.0194 -0.1379)
OKLCH	oklch(38.06% 0.139 262)
XYZ	xyz(6.5629, 5.2437, 25.0873)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143C8B #8B6314

analogous

#14778B #143C8B #27148B

triadic

#143C8B #8B143C #3C8B14

tetradic

#143C8B #8B1477 #8B6314 #148B27

square

#143C8B #8B1477 #8B6314 #148B27

split-complementary

#143C8B #8B2714 #778B14

monochromatic

#050E20 #0C2555 #143C8B #1C53C1 #3771E2

Accessibility & contrast

On white

10.25

#143C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#143C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143C8B

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143C8B	#FFFFFF	#000000	##FFFFFF
##143C8B	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #143c8b;
/* rgb */ color: rgb(20, 60, 139);
/* oklch */ color: oklch(38.1% 0.139 262.0);

Tailwind

colors: {
  custom: {
    50: '#6971ae',
    500: '#143c8b',
    950: '#000000',
  },
}

SCSS

$custom: #143c8b;
$custom-light: #6971ae;
$custom-dark: #000000;

JSON

{
  "hex": "#143c8b",
  "rgb": {
    "r": 20,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 219.832,
    "s": 74.843,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38057,
    "c": 0.13926,
    "h": 262
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary

#143C8B

secondary

#BF933C

accent

#B336F1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #143C8B

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

Preview Lab → · Contrast checker → · Palette generator →