#1B5783#1B5783

#1B5783 is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.1% C 0.094 H 244.9°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX#1B5783
RGBrgb(27, 87, 131)
HSLhsl(205, 66%, 31%)
HSVhsv(205, 79%, 51%)
CMYKcmyk(79.4%, 33.6%, 0%, 48.6%)
CIE-LABlab(35.37, -2.73, -30.06)
CIE-LCHlch(35.37, 30.18, 264.81°)
OKLaboklab(44.11% -0.04 -0.0853)
OKLCHoklch(44.11% 0.094 244.9)
XYZxyz(7.9553, 8.6872, 22.7258)
Luminance0.0869 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B5783 #83471B
analogous
#1B837B #1B5783 #1B2383
triadic
#1B5783 #831B57 #57831B
tetradic
#1B5783 #7B1B83 #83471B #23831B
square
#1B5783 #7B1B83 #83471B #23831B
split-complementary
#1B5783 #831B23 #837B1B
monochromatic
#06141E #113550 #1B5783 #2579B6 #4198D8

Accessibility & contrast

On white

7.67
#1B5783 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.74
#1B5783 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5783
7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B5783#FFFFFF#000000##FFFFFF
##1B57831.007.672.747.67
#FFFFFF7.671.0021.001.00
#0000002.7421.001.0021.00
##FFFFFF7.671.0021.001.00

Color blindness preview

Protanopia (red-blind)
#435885
Deuteranopia (green-blind)
#344F82
Tritanopia (blue-blind)
#006267
Achromatopsia (no color)
#535353

Design tokens & code

CSS
--color: #1b5783;
/* rgb */ color: rgb(27, 87, 131);
/* oklch */ color: oklch(44.1% 0.094 244.9);
Tailwind
colors: {
  custom: {
    50: '#6886a7',
    500: '#1b5783',
    950: '#000000',
  },
}
SCSS
$custom: #1b5783;
$custom-light: #6886a7;
$custom-dark: #000000;
JSON
{
  "hex": "#1b5783",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 131
  },
  "hsl": {
    "h": 205.385,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.44106,
    "c": 0.09425,
    "h": 244.9
  },
  "luminance": 0.08688
}

Semantic roles & 50–950 ramp

primary
#1B5783
secondary
#B67443
accent
#873FE9
background
#F6F8FA
surface
#EBEFF4
border
#C6CACE
text
#070B0F
muted
#7A7C7F

Preview Lab

Preview with #1B5783

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

Preview Lab → · Contrast checker → · Palette generator →

#1B5783 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva