#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
RGB	rgb(20, 58, 139)
HSL	hsl(221, 75%, 31%)
HSV	hsv(221, 86%, 55%)
CMYK	cmyk(85.6%, 58.3%, 0%, 45.5%)
CIE-LAB	lab(26.84, 19.38, -48.69)
CIE-LCH	lch(26.84, 52.40, 291.71°)
OKLab	oklab(37.62% -0.018 -0.1407)
OKLCH	oklch(37.62% 0.142 262.7)
XYZ	xyz(6.4601, 5.0381, 25.0531)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

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
##143A8B	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

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 →