#1D557F#1D557F

#1D557F is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.4% C 0.090 H 245.0°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX#1D557F
RGBrgb(29, 85, 127)
HSLhsl(206, 63%, 31%)
HSVhsv(206, 77%, 50%)
CMYKcmyk(77.2%, 33.1%, 0%, 50.2%)
CIE-LABlab(34.58, -2.75, -28.85)
CIE-LCHlch(34.58, 28.98, 264.55°)
OKLaboklab(43.43% -0.0382 -0.0818)
OKLCHoklch(43.43% 0.09 245)
XYZxyz(7.5845, 8.2896, 21.2749)
Luminance0.0829 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1D557F #7F471D
analogous
#1D7F78 #1D557F #1D247F
triadic
#1D557F #7F1D55 #557F1D
tetradic
#1D557F #781D7F #7F471D #247F1D
square
#1D557F #781D7F #7F471D #247F1D
split-complementary
#1D557F #7F1D24 #7F781D
monochromatic
#06121B #12344D #1D557F #2876B1 #4296D4

Accessibility & contrast

On white

7.90
#1D557F on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.66
#1D557F on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D557F
7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1D557F#FFFFFF#000000##FFFFFF
##1D557F1.007.902.667.90
#FFFFFF7.901.0021.001.00
#0000002.6621.001.0021.00
##FFFFFF7.901.0021.001.00

Color blindness preview

Protanopia (red-blind)
#425681
Deuteranopia (green-blind)
#344D7E
Tritanopia (blue-blind)
#005F64
Achromatopsia (no color)
#515151

Design tokens & code

CSS
--color: #1d557f;
/* rgb */ color: rgb(29, 85, 127);
/* oklch */ color: oklch(43.4% 0.090 245.0);
Tailwind
colors: {
  custom: {
    50: '#6884a4',
    500: '#1d557f',
    950: '#000000',
  },
}
SCSS
$custom: #1d557f;
$custom-light: #6884a4;
$custom-dark: #000000;
JSON
{
  "hex": "#1d557f",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 127
  },
  "hsl": {
    "h": 205.714,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.43425,
    "c": 0.09027,
    "h": 245
  },
  "luminance": 0.08291
}

Semantic roles & 50–950 ramp

primary
#1D557F
secondary
#B27445
accent
#8842E6
background
#F6F8FA
surface
#EBEFF4
border
#C6CACE
text
#070A0F
muted
#7A7C7F

Preview Lab

Preview with #1D557F

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

Preview Lab → · Contrast checker → · Palette generator →

#1D557F Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva