#143F8A#143F8A

#143F8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.134 H 260.7°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#143F8A
RGB	rgb(20, 63, 138)
HSL	hsl(218, 75%, 31%)
HSV	hsv(218, 86%, 54%)
CMYK	cmyk(85.5%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(28.22, 15.47, -45.84)
CIE-LCH	lch(28.22, 48.38, 288.64°)
OKLab	oklab(38.64% -0.0215 -0.1322)
OKLCH	oklch(38.64% 0.134 260.7)
XYZ	xyz(6.6518, 5.5379, 24.7582)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143F8A #8A5F14

analogous

#147A8A #143F8A #24148A

triadic

#143F8A #8A143F #3F8A14

tetradic

#143F8A #8A147A #8A5F14 #148A24

square

#143F8A #8A147A #8A5F14 #148A24

split-complementary

#143F8A #8A2414 #7A8A14

monochromatic

#050E1F #0C2755 #143F8A #1C57BF #3675E2

Accessibility & contrast

On white

9.96

#143F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#143F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143F8A

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143F8A	#FFFFFF	#000000	##FFFFFF
##143F8A	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04488D

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #143f8a;
/* rgb */ color: rgb(20, 63, 138);
/* oklch */ color: oklch(38.6% 0.134 260.7);

Tailwind

colors: {
  custom: {
    50: '#6873ad',
    500: '#143f8a',
    950: '#000000',
  },
}

SCSS

$custom: #143f8a;
$custom-light: #6873ad;
$custom-dark: #000000;

JSON

{
  "hex": "#143f8a",
  "rgb": {
    "r": 20,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 218.136,
    "s": 74.684,
    "l": 30.98
  },
  "oklch": {
    "l": 0.38637,
    "c": 0.13396,
    "h": 260.7
  },
  "luminance": 0.05539
}

Semantic roles & 50–950 ramp

primary

#143F8A

secondary

#BE8F3C

accent

#AD36F1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #143F8A

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

Preview Lab → · Contrast checker → · Palette generator →