#18537D#18537D

#18537D is a dark, moderate cyan. Relative luminance 0.079; OKLCH L 42.6% C 0.091 H 244.3°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX#18537D
RGBrgb(24, 83, 125)
HSLhsl(205, 68%, 29%)
HSVhsv(205, 81%, 49%)
CMYKcmyk(80.8%, 33.6%, 0%, 51%)
CIE-LABlab(33.69, -2.92, -29.03)
CIE-LCHlch(33.69, 29.17, 264.26°)
OKLaboklab(42.65% -0.0396 -0.0824)
OKLCHoklch(42.65% 0.091 244.3)
XYZxyz(7.1702, 7.8605, 20.5374)
Luminance0.0786 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#18537D #7D4218
analogous
#187D75 #18537D #18217D
triadic
#18537D #7D1853 #537D18
tetradic
#18537D #75187D #7D4218 #217D18
square
#18537D #75187D #7D4218 #217D18
split-complementary
#18537D #7D1821 #7D7518
monochromatic
#05111A #0E314A #18537D #2275B0 #3795D9

Accessibility & contrast

On white

8.16
#18537D on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.57
#18537D on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18537D
8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##18537D#FFFFFF#000000##FFFFFF
##18537D1.008.162.578.16
#FFFFFF8.161.0021.001.00
#0000002.5721.001.0021.00
##FFFFFF8.161.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3F547F
Deuteranopia (green-blind)
#314B7C
Tritanopia (blue-blind)
#005D62
Achromatopsia (no color)
#4F4F4F

Design tokens & code

CSS
--color: #18537d;
/* rgb */ color: rgb(24, 83, 125);
/* oklch */ color: oklch(42.6% 0.091 244.3);
Tailwind
colors: {
  custom: {
    50: '#6683a3',
    500: '#18537d',
    950: '#000000',
  },
}
SCSS
$custom: #18537d;
$custom-light: #6683a3;
$custom-dark: #000000;
JSON
{
  "hex": "#18537d",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 125
  },
  "hsl": {
    "h": 204.95,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.42649,
    "c": 0.0914,
    "h": 244.3
  },
  "luminance": 0.07861
}

Semantic roles & 50–950 ramp

primary
#18537D
secondary
#B26F3F
accent
#853DEB
background
#F6F7FA
surface
#EBEEF3
border
#C6C9CD
text
#070A0F
muted
#7A7C7F

Preview Lab

Preview with #18537D

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

Preview Lab → · Contrast checker → · Palette generator →

#18537D Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva