#18578D#18578D

#18578D is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.6% C 0.108 H 249.1°. Best body text is #FFFFFF at 7.54:1 contrast (WCAG AA passes).

Color values

HEX#18578D
RGBrgb(24, 87, 141)
HSLhsl(208, 71%, 32%)
HSVhsv(208, 83%, 55%)
CMYKcmyk(83%, 38.3%, 0%, 44.7%)
CIE-LABlab(35.85, 0.88, -35.41)
CIE-LCHlch(35.85, 35.42, 271.42°)
OKLaboklab(44.64% -0.0386 -0.101)
OKLCHoklch(44.64% 0.108 249.1)
XYZxyz(8.5908, 8.9326, 26.4655)
Luminance0.0893 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#18578D #8D4E18
analogous
#188D88 #18578D #181D8D
triadic
#18578D #8D1857 #578D18
tetradic
#18578D #88188D #8D4E18 #1D8D18
square
#18578D #88188D #8D4E18 #1D8D18
split-complementary
#18578D #8D181D #8D8818
monochromatic
#061624 #0F3759 #18578D #2177C1 #4196DF

Accessibility & contrast

On white

7.54
#18578D on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.79
#18578D on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578D
7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##18578D#FFFFFF#000000##FFFFFF
##18578D1.007.542.797.54
#FFFFFF7.541.0021.001.00
#0000002.7921.001.0021.00
##FFFFFF7.541.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3D5A8F
Deuteranopia (green-blind)
#2B508C
Tritanopia (blue-blind)
#00646B
Achromatopsia (no color)
#545454

Design tokens & code

CSS
--color: #18578d;
/* rgb */ color: rgb(24, 87, 141);
/* oklch */ color: oklch(44.6% 0.108 249.1);
Tailwind
colors: {
  custom: {
    50: '#6986ae',
    500: '#18578d',
    950: '#000000',
  },
}
SCSS
$custom: #18578d;
$custom-light: #6986ae;
$custom-dark: #000000;
JSON
{
  "hex": "#18578d",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 141
  },
  "hsl": {
    "h": 207.692,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.44643,
    "c": 0.10814,
    "h": 249.1
  },
  "luminance": 0.08934
}

Semantic roles & 50–950 ramp

primary
#18578D
secondary
#BF7C42
accent
#8D3AEE
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#070B10
muted
#7A7C7F

Preview Lab

Preview with #18578D

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

Preview Lab → · Contrast checker → · Palette generator →

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