#143D7B#143D7B

#143D7B is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.115 H 258.9°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#143D7B
RGB	rgb(20, 61, 123)
HSL	hsl(216, 72%, 28%)
HSV	hsv(216, 84%, 48%)
CMYK	cmyk(83.7%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(26.49, 10.60, -39.26)
CIE-LCH	lch(26.49, 40.67, 285.11°)
OKLab	oklab(36.96% -0.0221 -0.1129)
OKLCH	oklch(36.96% 0.115 258.9)
XYZ	xyz(5.5311, 4.9156, 19.3923)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143D7B #7B5214

analogous

#14707B #143D7B #1F147B

triadic

#143D7B #7B143D #3D7B14

tetradic

#143D7B #7B1470 #7B5214 #147B1F

square

#143D7B #7B1470 #7B5214 #147B1F

split-complementary

#143D7B #7B1F14 #707B14

monochromatic

#040D1A #0B2346 #143D7B #1D57B0 #2D73DD

Accessibility & contrast

On white

10.59

#143D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#143D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143D7B

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143D7B	#FFFFFF	#000000	##FFFFFF
##143D7B	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19447D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #143d7b;
/* rgb */ color: rgb(20, 61, 123);
/* oklch */ color: oklch(37.0% 0.115 258.9);

Tailwind

colors: {
  custom: {
    50: '#6471a2',
    500: '#143d7b',
    950: '#000000',
  },
}

SCSS

$custom: #143d7b;
$custom-light: #6471a2;
$custom-dark: #000000;

JSON

{
  "hex": "#143d7b",
  "rgb": {
    "r": 20,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 216.117,
    "s": 72.028,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36964,
    "c": 0.11506,
    "h": 258.9
  },
  "luminance": 0.04916
}

Semantic roles & 50–950 ramp

primary

#143D7B

secondary

#B1813A

accent

#A639EF

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #143D7B

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

Preview Lab → · Contrast checker → · Palette generator →