#143F8E#143F8E

#143F8E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.0% C 0.140 H 261.3°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#143F8E
RGB	rgb(20, 63, 142)
HSL	hsl(219, 75%, 32%)
HSV	hsv(219, 86%, 56%)
CMYK	cmyk(85.9%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(28.53, 17.12, -47.80)
CIE-LCH	lch(28.53, 50.78, 289.71°)
OKLab	oklab(38.97% -0.0211 -0.138)
OKLCH	oklch(38.97% 0.14 261.3)
XYZ	xyz(6.9467, 5.6559, 26.3115)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143F8E #8E6314

analogous

#147C8E #143F8E #26148E

triadic

#143F8E #8E143F #3F8E14

tetradic

#143F8E #8E147C #8E6314 #148E26

square

#143F8E #8E147C #8E6314 #148E26

split-complementary

#143F8E #8E2614 #7C8E14

monochromatic

#050F23 #0C2758 #143F8E #1C57C4 #3975E3

Accessibility & contrast

On white

9.85

#143F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#143F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143F8E

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143F8E	#FFFFFF	#000000	##FFFFFF
##143F8E	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003E8C

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #143f8e;
/* rgb */ color: rgb(20, 63, 142);
/* oklch */ color: oklch(39.0% 0.140 261.3);

Tailwind

colors: {
  custom: {
    50: '#6973b0',
    500: '#143f8e',
    950: '#000000',
  },
}

SCSS

$custom: #143f8e;
$custom-light: #6973b0;
$custom-dark: #000000;

JSON

{
  "hex": "#143f8e",
  "rgb": {
    "r": 20,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 218.852,
    "s": 75.309,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38973,
    "c": 0.1396,
    "h": 261.3
  },
  "luminance": 0.05657
}

Semantic roles & 50–950 ramp

primary

#143F8E

secondary

#C2933C

accent

#B036F2

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #143F8E

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

Preview Lab → · Contrast checker → · Palette generator →