#18537E#18537E

#18537E is a dark, moderate cyan. Relative luminance 0.079; OKLCH L 42.7% C 0.093 H 244.9°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX#18537E
RGBrgb(24, 83, 126)
HSLhsl(205, 68%, 29%)
HSVhsv(205, 81%, 49%)
CMYKcmyk(81%, 34.1%, 0%, 50.6%)
CIE-LABlab(33.74, -2.52, -29.56)
CIE-LCHlch(33.74, 29.67, 265.13°)
OKLaboklab(42.71% -0.0393 -0.0839)
OKLCHoklch(42.71% 0.093 244.9)
XYZxyz(7.2344, 7.8862, 20.8755)
Luminance0.0789 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#18537E #7E4318
analogous
#187E76 #18537E #18207E
triadic
#18537E #7E1853 #537E18
tetradic
#18537E #76187E #7E4318 #207E18
square
#18537E #76187E #7E4318 #207E18
split-complementary
#18537E #7E1820 #7E7618
monochromatic
#05111A #0E314B #18537E #2275B1 #3795D9

Accessibility & contrast

On white

8.15
#18537E on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.58
#18537E on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18537E
8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##18537E#FFFFFF#000000##FFFFFF
##18537E1.008.152.588.15
#FFFFFF8.151.0021.001.00
#0000002.5821.001.0021.00
##FFFFFF8.151.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3F5580
Deuteranopia (green-blind)
#314B7D
Tritanopia (blue-blind)
#005D62
Achromatopsia (no color)
#4F4F4F

Design tokens & code

CSS
--color: #18537e;
/* rgb */ color: rgb(24, 83, 126);
/* oklch */ color: oklch(42.7% 0.093 244.9);
Tailwind
colors: {
  custom: {
    50: '#6683a3',
    500: '#18537e',
    950: '#000000',
  },
}
SCSS
$custom: #18537e;
$custom-light: #6683a3;
$custom-dark: #000000;
JSON
{
  "hex": "#18537e",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 126
  },
  "hsl": {
    "h": 205.294,
    "s": 68,
    "l": 29.412
  },
  "oklch": {
    "l": 0.42709,
    "c": 0.09268,
    "h": 244.9
  },
  "luminance": 0.07887
}

Semantic roles & 50–950 ramp

primary
#18537E
secondary
#B2703F
accent
#863DEB
background
#F6F7FA
surface
#EBEEF4
border
#C6C9CE
text
#070A0F
muted
#7A7C7F

Preview Lab

Preview with #18537E

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

Preview Lab → · Contrast checker → · Palette generator →

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