#143F5B#143F5B

#143F5B is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.3% C 0.068 H 241.2°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#143F5B
RGB	rgb(20, 63, 91)
HSL	hsl(204, 64%, 22%)
HSV	hsv(204, 78%, 36%)
CMYK	cmyk(78%, 30.8%, 0%, 64.3%)
CIE-LAB	lab(25.13, -4.05, -20.93)
CIE-LCH	lch(25.13, 21.32, 259.04°)
OKLab	oklab(35.25% -0.0325 -0.0591)
OKLCH	oklch(35.25% 0.068 241.2)
XYZ	xyz(3.9536, 4.4586, 10.5477)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143F5B #5B3014

analogous

#145B54 #143F5B #141C5B

triadic

#143F5B #5B143F #3F5B14

tetradic

#143F5B #54145B #5B3014 #1C5B14

square

#143F5B #54145B #5B3014 #1C5B14

split-complementary

#143F5B #5B141C #5B5414

monochromatic

#061119 #091C29 #143F5B #1F628D #2A84BF

Accessibility & contrast

On white

11.10

#143F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#143F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143F5B

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143F5B	#FFFFFF	#000000	##FFFFFF
##143F5B	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323F5C

Deuteranopia (green-blind)

#28395A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #143f5b;
/* rgb */ color: rgb(20, 63, 91);
/* oklch */ color: oklch(35.3% 0.068 241.2);

Tailwind

colors: {
  custom: {
    50: '#5d7389',
    500: '#143f5b',
    950: '#000000',
  },
}

SCSS

$custom: #143f5b;
$custom-light: #5d7389;
$custom-dark: #000000;

JSON

{
  "hex": "#143f5b",
  "rgb": {
    "r": 20,
    "g": 63,
    "b": 91
  },
  "hsl": {
    "h": 203.662,
    "s": 63.964,
    "l": 21.765
  },
  "oklch": {
    "l": 0.35253,
    "c": 0.0675,
    "h": 241.2
  },
  "luminance": 0.04459
}

Semantic roles & 50–950 ramp

primary

#143F5B

secondary

#935C38

accent

#8241E7

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #143F5B

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

Preview Lab → · Contrast checker → · Palette generator →