#1D538B#1D538B

#1D538B is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.7% C 0.108 H 252.4°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX#1D538B
RGBrgb(29, 83, 139)
HSLhsl(211, 65%, 33%)
HSVhsv(211, 79%, 55%)
CMYKcmyk(79.1%, 40.3%, 0%, 45.5%)
CIE-LABlab(34.62, 3.26, -36.14)
CIE-LCHlch(34.62, 36.29, 275.15°)
OKLaboklab(43.68% -0.0327 -0.1032)
OKLCHoklch(43.68% 0.108 252.4)
XYZxyz(8.2584, 8.3108, 25.5900)
Luminance0.0831 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1D538B #8B551D
analogous
#1D8A8B #1D538B #1E1D8B
triadic
#1D538B #8B1D53 #538B1D
tetradic
#1D538B #8B1D8A #8B551D #1D8B1E
square
#1D538B #8B1D8A #8B551D #1D8B1E
split-complementary
#1D538B #8B1E1D #8A8B1D
monochromatic
#081726 #123558 #1D538B #2871BE #4990D9

Accessibility & contrast

On white

7.89
#1D538B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.66
#1D538B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D538B
7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1D538B#FFFFFF#000000##FFFFFF
##1D538B1.007.892.667.89
#FFFFFF7.891.0021.001.00
#0000002.6621.001.0021.00
##FFFFFF7.891.0021.001.00

Color blindness preview

Protanopia (red-blind)
#38578D
Deuteranopia (green-blind)
#274D8A
Tritanopia (blue-blind)
#006068
Achromatopsia (no color)
#515151

Design tokens & code

CSS
--color: #1d538b;
/* rgb */ color: rgb(29, 83, 139);
/* oklch */ color: oklch(43.7% 0.108 252.4);
Tailwind
colors: {
  custom: {
    50: '#6a82ad',
    500: '#1d538b',
    950: '#000000',
  },
}
SCSS
$custom: #1d538b;
$custom-light: #6a82ad;
$custom-dark: #000000;
JSON
{
  "hex": "#1d538b",
  "rgb": {
    "r": 29,
    "g": 83,
    "b": 139
  },
  "hsl": {
    "h": 210.545,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.43678,
    "c": 0.10825,
    "h": 252.4
  },
  "luminance": 0.08312
}

Semantic roles & 50–950 ramp

primary
#1D538B
secondary
#BB8349
accent
#953FE8
background
#F6F7FA
surface
#ECEEF4
border
#C7C9CE
text
#070A10
muted
#7A7C7F

Preview Lab

Preview with #1D538B

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

Preview Lab → · Contrast checker → · Palette generator →

#1D538B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva