#18578E#18578E

#18578E is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.7% C 0.109 H 249.5°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#18578E
RGB	rgb(24, 87, 142)
HSL	hsl(208, 71%, 33%)
HSV	hsv(208, 83%, 56%)
CMYK	cmyk(83.1%, 38.7%, 0%, 44.3%)
CIE-LAB	lab(35.91, 1.28, -35.93)
CIE-LCH	lch(35.91, 35.95, 272.04°)
OKLab	oklab(44.71% -0.0383 -0.1025)
OKLCH	oklch(44.71% 0.109 249.5)
XYZ	xyz(8.6655, 8.9625, 26.8592)
Luminance	0.0896 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18578E #8E4F18

analogous

#188E8A #18578E #181C8E

triadic

#18578E #8E1857 #578E18

tetradic

#18578E #8A188E #8E4F18 #1C8E18

square

#18578E #8A188E #8E4F18 #1C8E18

split-complementary

#18578E #8E181C #8E8A18

monochromatic

#061725 #0F375A #18578E #2177C2 #4196DF

Accessibility & contrast

On white

7.52

#18578E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#18578E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578E

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18578E	#FFFFFF	#000000	##FFFFFF
##18578E	1.00	7.52	2.79	7.52
#FFFFFF	7.52	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D5A90

Deuteranopia (green-blind)

#2B508D

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #18578e;
/* rgb */ color: rgb(24, 87, 142);
/* oklch */ color: oklch(44.7% 0.109 249.5);

Tailwind

colors: {
  custom: {
    50: '#6a86af',
    500: '#18578e',
    950: '#000000',
  },
}

SCSS

$custom: #18578e;
$custom-light: #6a86af;
$custom-dark: #000000;

JSON

{
  "hex": "#18578e",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 142
  },
  "hsl": {
    "h": 207.966,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.44707,
    "c": 0.10945,
    "h": 249.5
  },
  "luminance": 0.08964
}

Semantic roles & 50–950 ramp

primary

#18578E

secondary

#C07D42

accent

#8E3AEE

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #18578E

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

Preview Lab → · Contrast checker → · Palette generator →