#143F9F#143F9F

#143F9F is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.163 H 263.0°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#143F9F
RGB	rgb(20, 63, 159)
HSL	hsl(221, 78%, 35%)
HSV	hsv(221, 87%, 62%)
CMYK	cmyk(87.4%, 60.4%, 0%, 37.6%)
CIE-LAB	lab(29.93, 24.06, -55.91)
CIE-LCH	lch(29.93, 60.87, 293.29°)
OKLab	oklab(40.47% -0.0199 -0.1618)
OKLCH	oklch(40.47% 0.163 263)
XYZ	xyz(8.3218, 6.2059, 33.5534)
Luminance	0.0621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143F9F #9F7414

analogous

#14849F #143F9F #2F149F

triadic

#143F9F #9F143F #3F9F14

tetradic

#143F9F #9F1484 #9F7414 #149F2F

square

#143F9F #9F1484 #9F7414 #149F2F

split-complementary

#143F9F #9F2F14 #849F14

monochromatic

#061432 #0D2969 #143F9F #1B55D5 #4678E8

Accessibility & contrast

On white

9.37

#143F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#143F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143F9F

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143F9F	#FFFFFF	#000000	##FFFFFF
##143F9F	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00409D

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #143f9f;
/* rgb */ color: rgb(20, 63, 159);
/* oklch */ color: oklch(40.5% 0.163 263.0);

Tailwind

colors: {
  custom: {
    50: '#6e73bc',
    500: '#143f9f',
    950: '#000000',
  },
}

SCSS

$custom: #143f9f;
$custom-light: #6e73bc;
$custom-dark: #000000;

JSON

{
  "hex": "#143f9f",
  "rgb": {
    "r": 20,
    "g": 63,
    "b": 159
  },
  "hsl": {
    "h": 221.439,
    "s": 77.654,
    "l": 35.098
  },
  "oklch": {
    "l": 0.40465,
    "c": 0.16301,
    "h": 263
  },
  "luminance": 0.06207
}

Semantic roles & 50–950 ramp

primary

#143F9F

secondary

#C8A046

accent

#B934F4

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #143F9F

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

Preview Lab → · Contrast checker → · Palette generator →