#143C81#143C81

#143C81 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.2% C 0.125 H 260.6°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#143C81
RGB	rgb(20, 60, 129)
HSL	hsl(218, 73%, 29%)
HSV	hsv(218, 84%, 51%)
CMYK	cmyk(84.5%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(26.63, 13.82, -42.80)
CIE-LCH	lch(26.63, 44.98, 287.89°)
OKLab	oklab(37.21% -0.0204 -0.1233)
OKLCH	oklch(37.21% 0.125 260.6)
XYZ	xyz(5.8654, 4.9647, 21.4138)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143C81 #815914

analogous

#147381 #143C81 #231481

triadic

#143C81 #81143C #3C8114

tetradic

#143C81 #811473 #815914 #148123

square

#143C81 #811473 #815914 #148123

split-complementary

#143C81 #812314 #738114

monochromatic

#040C1A #0C234C #143C81 #1C55B6 #3070DF

Accessibility & contrast

On white

10.54

#143C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#143C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143C81

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143C81	#FFFFFF	#000000	##FFFFFF
##143C81	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C4483

Deuteranopia (green-blind)

#003A80

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #143c81;
/* rgb */ color: rgb(20, 60, 129);
/* oklch */ color: oklch(37.2% 0.125 260.6);

Tailwind

colors: {
  custom: {
    50: '#6671a6',
    500: '#143c81',
    950: '#000000',
  },
}

SCSS

$custom: #143c81;
$custom-light: #6671a6;
$custom-dark: #000000;

JSON

{
  "hex": "#143c81",
  "rgb": {
    "r": 20,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 217.982,
    "s": 73.154,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37213,
    "c": 0.12503,
    "h": 260.6
  },
  "luminance": 0.04965
}

Semantic roles & 50–950 ramp

primary

#143C81

secondary

#B6893B

accent

#AC38F0

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #143C81

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

Preview Lab → · Contrast checker → · Palette generator →