#1D558B#1D558B

#1D558B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.2% C 0.106 H 250.9°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX#1D558B
RGBrgb(29, 85, 139)
HSLhsl(209, 65%, 33%)
HSVhsv(209, 79%, 55%)
CMYKcmyk(79.1%, 38.8%, 0%, 45.5%)
CIE-LABlab(35.24, 1.95, -35.15)
CIE-LCHlch(35.24, 35.21, 273.18°)
OKLaboklab(44.17% -0.0346 -0.1002)
OKLCHoklch(44.17% 0.106 250.9)
XYZxyz(8.4136, 8.6213, 25.6417)
Luminance0.0862 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1D558B #8B531D
analogous
#1D8B8A #1D558B #1D1E8B
triadic
#1D558B #8B1D55 #558B1D
tetradic
#1D558B #8A1D8B #8B531D #1E8B1D
square
#1D558B #8A1D8B #8B531D #1E8B1D
split-complementary
#1D558B #8B1D1E #8B8A1D
monochromatic
#081726 #123658 #1D558B #2874BE #4993D9

Accessibility & contrast

On white

7.71
#1D558B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.72
#1D558B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D558B
7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1D558B#FFFFFF#000000##FFFFFF
##1D558B1.007.712.727.71
#FFFFFF7.711.0021.001.00
#0000002.7221.001.0021.00
##FFFFFF7.711.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3C588D
Deuteranopia (green-blind)
#2B4E8A
Tritanopia (blue-blind)
#006269
Achromatopsia (no color)
#535353

Design tokens & code

CSS
--color: #1d558b;
/* rgb */ color: rgb(29, 85, 139);
/* oklch */ color: oklch(44.2% 0.106 250.9);
Tailwind
colors: {
  custom: {
    50: '#6a84ad',
    500: '#1d558b',
    950: '#000000',
  },
}
SCSS
$custom: #1d558b;
$custom-light: #6a84ad;
$custom-dark: #000000;
JSON
{
  "hex": "#1d558b",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 209.455,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.44165,
    "c": 0.10606,
    "h": 250.9
  },
  "luminance": 0.08622
}

Semantic roles & 50–950 ramp

primary
#1D558B
secondary
#BB8149
accent
#923FE8
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#070A10
muted
#7A7C7F

Preview Lab

Preview with #1D558B

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

Preview Lab → · Contrast checker → · Palette generator →

#1D558B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva