#1B5790#1B5790

#1B5790 is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.111 H 251.0°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX#1B5790
RGBrgb(27, 87, 144)
HSLhsl(209, 68%, 34%)
HSVhsv(209, 81%, 56%)
CMYKcmyk(81.3%, 39.6%, 0%, 43.5%)
CIE-LABlab(36.10, 2.40, -36.83)
CIE-LCHlch(36.10, 36.91, 273.73°)
OKLaboklab(44.92% -0.0363 -0.1051)
OKLCHoklch(44.92% 0.111 251)
XYZxyz(8.8923, 9.0619, 27.6606)
Luminance0.0906 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B5790 #90541B
analogous
#1B908E #1B5790 #1B1C90
triadic
#1B5790 #901B57 #57901B
tetradic
#1B5790 #8E1B90 #90541B #1C901B
square
#1B5790 #8E1B90 #90541B #1C901B
split-complementary
#1B5790 #901B1C #908E1B
monochromatic
#081929 #11385C #1B5790 #2576C4 #4995DD

Accessibility & contrast

On white

7.47
#1B5790 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.81
#1B5790 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5790
7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B5790#FFFFFF#000000##FFFFFF
##1B57901.007.472.817.47
#FFFFFF7.471.0021.001.00
#0000002.8121.001.0021.00
##FFFFFF7.471.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3C5B92
Deuteranopia (green-blind)
#29508F
Tritanopia (blue-blind)
#00656C
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #1b5790;
/* rgb */ color: rgb(27, 87, 144);
/* oklch */ color: oklch(44.9% 0.111 251.0);
Tailwind
colors: {
  custom: {
    50: '#6b86b1',
    500: '#1b5790',
    950: '#000000',
  },
}
SCSS
$custom: #1b5790;
$custom-light: #6b86b1;
$custom-dark: #000000;
JSON
{
  "hex": "#1b5790",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 144
  },
  "hsl": {
    "h": 209.231,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.44916,
    "c": 0.11123,
    "h": 251
  },
  "luminance": 0.09063
}

Semantic roles & 50–950 ramp

primary
#1B5790
secondary
#BF8248
accent
#923DEB
background
#F6F8FA
surface
#ECEFF5
border
#C7CACF
text
#080B10
muted
#7A7C7F

Preview Lab

Preview with #1B5790

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

Preview Lab → · Contrast checker → · Palette generator →

#1B5790 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva