#143B81#143B81

#143B81 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.0% C 0.126 H 261.0°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#143B81
RGB	rgb(20, 59, 129)
HSL	hsl(219, 73%, 29%)
HSV	hsv(219, 84%, 51%)
CMYK	cmyk(84.5%, 54.3%, 0%, 49.4%)
CIE-LAB	lab(26.33, 14.52, -43.29)
CIE-LCH	lch(26.33, 45.66, 288.55°)
OKLab	oklab(36.99% -0.0197 -0.1248)
OKLCH	oklch(36.99% 0.126 261)
XYZ	xyz(5.8135, 4.8609, 21.3965)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143B81 #815A14

analogous

#147281 #143B81 #241481

triadic

#143B81 #81143B #3B8114

tetradic

#143B81 #811472 #815A14 #148124

square

#143B81 #811472 #815A14 #148124

split-complementary

#143B81 #812414 #728114

monochromatic

#040C1A #0C234C #143B81 #1C53B6 #306FDF

Accessibility & contrast

On white

10.65

#143B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#143B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143B81

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143B81	#FFFFFF	#000000	##FFFFFF
##143B81	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#074483

Deuteranopia (green-blind)

#003A80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #143b81;
/* rgb */ color: rgb(20, 59, 129);
/* oklch */ color: oklch(37.0% 0.126 261.0);

Tailwind

colors: {
  custom: {
    50: '#6670a6',
    500: '#143b81',
    950: '#000000',
  },
}

SCSS

$custom: #143b81;
$custom-light: #6670a6;
$custom-dark: #000000;

JSON

{
  "hex": "#143b81",
  "rgb": {
    "r": 20,
    "g": 59,
    "b": 129
  },
  "hsl": {
    "h": 218.532,
    "s": 73.154,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36985,
    "c": 0.12634,
    "h": 261
  },
  "luminance": 0.04862
}

Semantic roles & 50–950 ramp

primary

#143B81

secondary

#B68A3B

accent

#AE38F0

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #143B81

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

Preview Lab → · Contrast checker → · Palette generator →