#1D588C#1D588C

#1D588C is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 45.0% C 0.104 H 249.1°. Best body text is #FFFFFF at 7.43:1 contrast (WCAG AA passes).

Color values

HEX#1D588C
RGBrgb(29, 88, 140)
HSLhsl(208, 66%, 33%)
HSVhsv(208, 79%, 55%)
CMYKcmyk(79.3%, 37.1%, 0%, 45.1%)
CIE-LABlab(36.24, 0.41, -34.18)
CIE-LCHlch(36.24, 34.19, 270.69°)
OKLaboklab(44.96% -0.0372 -0.0974)
OKLCHoklch(44.96% 0.104 249.1)
XYZxyz(8.7282, 9.1331, 26.1087)
Luminance0.0913 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1D588C #8C511D
analogous
#1D8C88 #1D588C #1D218C
triadic
#1D588C #8C1D58 #588C1D
tetradic
#1D588C #881D8C #8C511D #218C1D
square
#1D588C #881D8C #8C511D #218C1D
split-complementary
#1D588C #8C1D21 #8C881D
monochromatic
#081827 #123859 #1D588C #2878BF #4A96D9

Accessibility & contrast

On white

7.43
#1D588C on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.83
#1D588C on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D588C
7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1D588C#FFFFFF#000000##FFFFFF
##1D588C1.007.432.837.43
#FFFFFF7.431.0021.001.00
#0000002.8321.001.0021.00
##FFFFFF7.431.0021.001.00

Color blindness preview

Protanopia (red-blind)
#405B8E
Deuteranopia (green-blind)
#2F518B
Tritanopia (blue-blind)
#00646B
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #1d588c;
/* rgb */ color: rgb(29, 88, 140);
/* oklch */ color: oklch(45.0% 0.104 249.1);
Tailwind
colors: {
  custom: {
    50: '#6b86ae',
    500: '#1d588c',
    950: '#000000',
  },
}
SCSS
$custom: #1d588c;
$custom-light: #6b86ae;
$custom-dark: #000000;
JSON
{
  "hex": "#1d588c",
  "rgb": {
    "r": 29,
    "g": 88,
    "b": 140
  },
  "hsl": {
    "h": 208.108,
    "s": 65.68,
    "l": 33.137
  },
  "oklch": {
    "l": 0.44964,
    "c": 0.10422,
    "h": 249.1
  },
  "luminance": 0.09134
}

Semantic roles & 50–950 ramp

primary
#1D588C
secondary
#BC7F49
accent
#8F3FE9
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#080B10
muted
#7A7C7F

Preview Lab

Preview with #1D588C

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

Preview Lab → · Contrast checker → · Palette generator →

#1D588C Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva