#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
RGBrgb(24, 87, 142)
HSLhsl(208, 71%, 33%)
HSVhsv(208, 83%, 56%)
CMYKcmyk(83.1%, 38.7%, 0%, 44.3%)
CIE-LABlab(35.91, 1.28, -35.93)
CIE-LCHlch(35.91, 35.95, 272.04°)
OKLaboklab(44.71% -0.0383 -0.1025)
OKLCHoklch(44.71% 0.109 249.5)
XYZxyz(8.6655, 8.9625, 26.8592)
Luminance0.0896 (WCAG relative)
Temperaturecool
Familycyan

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
##18578E1.007.522.797.52
#FFFFFF7.521.0021.001.00
#0000002.7921.001.0021.00
##FFFFFF7.521.0021.001.00

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 →

#18578E Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva