#1C588B#1C588B

#1C588B is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.103 H 248.4°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX#1C588B
RGBrgb(28, 88, 139)
HSLhsl(208, 66%, 33%)
HSVhsv(208, 80%, 55%)
CMYKcmyk(79.9%, 36.7%, 0%, 45.5%)
CIE-LABlab(36.16, -0.11, -33.71)
CIE-LCHlch(36.16, 33.71, 269.82°)
OKLaboklab(44.87% -0.038 -0.096)
OKLCHoklch(44.87% 0.103 248.4)
XYZxyz(8.6270, 9.0894, 25.7208)
Luminance0.0909 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1C588B #8B4F1C
analogous
#1C8B87 #1C588B #1C208B
triadic
#1C588B #8B1C58 #588B1C
tetradic
#1C588B #871C8B #8B4F1C #208B1C
square
#1C588B #871C8B #8B4F1C #208B1C
split-complementary
#1C588B #8B1C20 #8B871C
monochromatic
#071825 #123858 #1C588B #2678BE #4797DA

Accessibility & contrast

On white

7.45
#1C588B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.82
#1C588B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C588B
7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1C588B#FFFFFF#000000##FFFFFF
##1C588B1.007.452.827.45
#FFFFFF7.451.0021.001.00
#0000002.8221.001.0021.00
##FFFFFF7.451.0021.001.00

Color blindness preview

Protanopia (red-blind)
#405B8D
Deuteranopia (green-blind)
#30508A
Tritanopia (blue-blind)
#00646B
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #1c588b;
/* rgb */ color: rgb(28, 88, 139);
/* oklch */ color: oklch(44.9% 0.103 248.4);
Tailwind
colors: {
  custom: {
    50: '#6a86ad',
    500: '#1c588b',
    950: '#000000',
  },
}
SCSS
$custom: #1c588b;
$custom-light: #6a86ad;
$custom-dark: #000000;
JSON
{
  "hex": "#1c588b",
  "rgb": {
    "r": 28,
    "g": 88,
    "b": 139
  },
  "hsl": {
    "h": 207.568,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.44872,
    "c": 0.10324,
    "h": 248.4
  },
  "luminance": 0.0909
}

Semantic roles & 50–950 ramp

primary
#1C588B
secondary
#BC7D47
accent
#8D3EE9
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#070B10
muted
#7A7C7F

Preview Lab

Preview with #1C588B

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

Preview Lab → · Contrast checker → · Palette generator →

#1C588B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva