#143A8E#143A8E

#143A8E is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.146 H 263.0°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#143A8E
RGB	rgb(20, 58, 142)
HSL	hsl(221, 75%, 32%)
HSV	hsv(221, 86%, 56%)
CMYK	cmyk(85.9%, 59.2%, 0%, 44.3%)
CIE-LAB	lab(27.09, 20.62, -50.13)
CIE-LCH	lch(27.09, 54.21, 292.35°)
OKLab	oklab(37.89% -0.0178 -0.1449)
OKLCH	oklch(37.89% 0.146 263)
XYZ	xyz(6.6823, 5.1270, 26.2234)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143A8E #8E6814

analogous

#14778E #143A8E #2B148E

triadic

#143A8E #8E143A #3A8E14

tetradic

#143A8E #8E1477 #8E6814 #148E2B

square

#143A8E #8E1477 #8E6814 #148E2B

split-complementary

#143A8E #8E2B14 #778E14

monochromatic

#050E23 #0C2458 #143A8E #1C50C4 #396EE3

Accessibility & contrast

On white

10.37

#143A8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#143A8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143A8E

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143A8E	#FFFFFF	#000000	##FFFFFF
##143A8E	1.00	10.37	2.03	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004691

Deuteranopia (green-blind)

#003B8C

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #143a8e;
/* rgb */ color: rgb(20, 58, 142);
/* oklch */ color: oklch(37.9% 0.146 263.0);

Tailwind

colors: {
  custom: {
    50: '#6a6fb0',
    500: '#143a8e',
    950: '#000000',
  },
}

SCSS

$custom: #143a8e;
$custom-light: #6a6fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#143a8e",
  "rgb": {
    "r": 20,
    "g": 58,
    "b": 142
  },
  "hsl": {
    "h": 221.311,
    "s": 75.309,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37889,
    "c": 0.14603,
    "h": 263
  },
  "luminance": 0.05128
}

Semantic roles & 50–950 ramp

primary

#143A8E

secondary

#C2983C

accent

#B736F2

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #143A8E

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

Preview Lab → · Contrast checker → · Palette generator →