#1D578F#1D578F

#1D578F is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.109 H 251.1°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX#1D578F
RGBrgb(29, 87, 143)
HSLhsl(209, 66%, 34%)
HSVhsv(209, 80%, 56%)
CMYKcmyk(79.7%, 39.2%, 0%, 43.9%)
CIE-LABlab(36.10, 2.24, -36.23)
CIE-LCHlch(36.10, 36.30, 273.53°)
OKLaboklab(44.91% -0.0354 -0.1034)
OKLCHoklch(44.91% 0.109 251.1)
XYZxyz(8.8709, 9.0597, 27.2624)
Luminance0.0906 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1D578F #8F551D
analogous
#1D8F8E #1D578F #1D1E8F
triadic
#1D578F #8F1D57 #578F1D
tetradic
#1D578F #8E1D8F #8F551D #1E8F1D
square
#1D578F #8E1D8F #8F551D #1E8F1D
split-complementary
#1D578F #8F1D1E #8F8E1D
monochromatic
#081929 #13385C #1D578F #2776C2 #4C94DB

Accessibility & contrast

On white

7.47
#1D578F on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.81
#1D578F on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578F
7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1D578F#FFFFFF#000000##FFFFFF
##1D578F1.007.472.817.47
#FFFFFF7.471.0021.001.00
#0000002.8121.001.0021.00
##FFFFFF7.471.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3C5B91
Deuteranopia (green-blind)
#2B508E
Tritanopia (blue-blind)
#00646C
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #1d578f;
/* rgb */ color: rgb(29, 87, 143);
/* oklch */ color: oklch(44.9% 0.109 251.1);
Tailwind
colors: {
  custom: {
    50: '#6b86b0',
    500: '#1d578f',
    950: '#000000',
  },
}
SCSS
$custom: #1d578f;
$custom-light: #6b86b0;
$custom-dark: #000000;
JSON
{
  "hex": "#1d578f",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 143
  },
  "hsl": {
    "h": 209.474,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.44909,
    "c": 0.10927,
    "h": 251.1
  },
  "luminance": 0.09061
}

Semantic roles & 50–950 ramp

primary
#1D578F
secondary
#BD834B
accent
#923FE9
background
#F6F8FA
surface
#ECEFF5
border
#C7CACF
text
#080B10
muted
#7A7C7F

Preview Lab

Preview with #1D578F

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

Preview Lab → · Contrast checker → · Palette generator →

#1D578F Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva