#18578C#18578C

#18578C is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.6% C 0.107 H 248.6°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX#18578C
RGBrgb(24, 87, 140)
HSLhsl(207, 71%, 32%)
HSVhsv(207, 83%, 55%)
CMYKcmyk(82.9%, 37.9%, 0%, 45.1%)
CIE-LABlab(35.80, 0.48, -34.89)
CIE-LCHlch(35.80, 34.90, 270.79°)
OKLaboklab(44.58% -0.0389 -0.0995)
OKLCHoklch(44.58% 0.107 248.6)
XYZxyz(8.5167, 8.9030, 26.0754)
Luminance0.0890 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#18578C #8C4D18
analogous
#188C87 #18578C #181D8C
triadic
#18578C #8C1857 #578C18
tetradic
#18578C #87188C #8C4D18 #1D8C18
square
#18578C #87188C #8C4D18 #1D8C18
split-complementary
#18578C #8C181D #8C8718
monochromatic
#061624 #0F3758 #18578C #2177C0 #4096DE

Accessibility & contrast

On white

7.55
#18578C on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.78
#18578C on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578C
7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##18578C#FFFFFF#000000##FFFFFF
##18578C1.007.552.787.55
#FFFFFF7.551.0021.001.00
#0000002.7821.001.0021.00
##FFFFFF7.551.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3E5A8E
Deuteranopia (green-blind)
#2C4F8B
Tritanopia (blue-blind)
#00646B
Achromatopsia (no color)
#545454

Design tokens & code

CSS
--color: #18578c;
/* rgb */ color: rgb(24, 87, 140);
/* oklch */ color: oklch(44.6% 0.107 248.6);
Tailwind
colors: {
  custom: {
    50: '#6986ae',
    500: '#18578c',
    950: '#000000',
  },
}
SCSS
$custom: #18578c;
$custom-light: #6986ae;
$custom-dark: #000000;
JSON
{
  "hex": "#18578c",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 140
  },
  "hsl": {
    "h": 207.414,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.44579,
    "c": 0.10682,
    "h": 248.6
  },
  "luminance": 0.08904
}

Semantic roles & 50–950 ramp

primary
#18578C
secondary
#BF7A41
accent
#8C3AED
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#070B10
muted
#7A7C7F

Preview Lab

Preview with #18578C

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

Preview Lab → · Contrast checker → · Palette generator →

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