#143E8B#143E8B

#143E8B is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.137 H 261.3°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#143E8B
RGB	rgb(20, 62, 139)
HSL	hsl(219, 75%, 31%)
HSV	hsv(219, 86%, 55%)
CMYK	cmyk(85.6%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(28.00, 16.58, -46.81)
CIE-LCH	lch(28.00, 49.66, 289.50°)
OKLab	oklab(38.5% -0.0207 -0.1351)
OKLCH	oklch(38.5% 0.137 261.3)
XYZ	xyz(6.6696, 5.4572, 25.1229)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143E8B #8B6114

analogous

#14798B #143E8B #26148B

triadic

#143E8B #8B143E #3E8B14

tetradic

#143E8B #8B1479 #8B6114 #148B26

square

#143E8B #8B1479 #8B6114 #148B26

split-complementary

#143E8B #8B2614 #798B14

monochromatic

#050E20 #0C2655 #143E8B #1C56C1 #3774E2

Accessibility & contrast

On white

10.04

#143E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#143E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143E8B

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143E8B	#FFFFFF	#000000	##FFFFFF
##143E8B	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #143e8b;
/* rgb */ color: rgb(20, 62, 139);
/* oklch */ color: oklch(38.5% 0.137 261.3);

Tailwind

colors: {
  custom: {
    50: '#6972ad',
    500: '#143e8b',
    950: '#000000',
  },
}

SCSS

$custom: #143e8b;
$custom-light: #6972ad;
$custom-dark: #000000;

JSON

{
  "hex": "#143e8b",
  "rgb": {
    "r": 20,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 218.824,
    "s": 74.843,
    "l": 31.176
  },
  "oklch": {
    "l": 0.38498,
    "c": 0.13667,
    "h": 261.3
  },
  "luminance": 0.05458
}

Semantic roles & 50–950 ramp

primary

#143E8B

secondary

#BF913C

accent

#AF36F1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #143E8B

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

Preview Lab → · Contrast checker → · Palette generator →