#143A8B#143A8B

#143A8B is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.6% C 0.142 H 262.7°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX#143A8B
RGBrgb(20, 58, 139)
HSLhsl(221, 75%, 31%)
HSVhsv(221, 86%, 55%)
CMYKcmyk(85.6%, 58.3%, 0%, 45.5%)
CIE-LABlab(26.84, 19.38, -48.69)
CIE-LCHlch(26.84, 52.40, 291.71°)
OKLaboklab(37.62% -0.018 -0.1407)
OKLCHoklch(37.62% 0.142 262.7)
XYZxyz(6.4601, 5.0381, 25.0531)
Luminance0.0504 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#143A8B #8B6514
analogous
#14758B #143A8B #29148B
triadic
#143A8B #8B143A #3A8B14
tetradic
#143A8B #8B1475 #8B6514 #148B29
square
#143A8B #8B1475 #8B6514 #148B29
split-complementary
#143A8B #8B2914 #758B14
monochromatic
#050D20 #0C2455 #143A8B #1C50C1 #376EE2

Accessibility & contrast

On white

10.46
#143A8B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.01
#143A8B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143A8B
10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##143A8B#FFFFFF#000000##FFFFFF
##143A8B1.0010.462.0110.46
#FFFFFF10.461.0021.001.00
#0000002.0121.001.0021.00
##FFFFFF10.461.0021.001.00

Color blindness preview

Protanopia (red-blind)
#00458E
Deuteranopia (green-blind)
#003A89
Tritanopia (blue-blind)
#004E5C
Achromatopsia (no color)
#3F3F3F

Design tokens & code

CSS
--color: #143a8b;
/* rgb */ color: rgb(20, 58, 139);
/* oklch */ color: oklch(37.6% 0.142 262.7);
Tailwind
colors: {
  custom: {
    50: '#696fae',
    500: '#143a8b',
    950: '#000000',
  },
}
SCSS
$custom: #143a8b;
$custom-light: #696fae;
$custom-dark: #000000;
JSON
{
  "hex": "#143a8b",
  "rgb": {
    "r": 20,
    "g": 58,
    "b": 139
  },
  "hsl": {
    "h": 220.84,
    "s": 74.843,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37623,
    "c": 0.14184,
    "h": 262.7
  },
  "luminance": 0.05039
}

Semantic roles & 50–950 ramp

primary
#143A8B
secondary
#BF953C
accent
#B636F1
background
#F6F6FA
surface
#ECECF4
border
#C7C7CE
text
#070710
muted
#7A7A7F

Preview Lab

Preview with #143A8B

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

Preview Lab → · Contrast checker → · Palette generator →

#143A8B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva