#1B557F#1B557F

#1B557F is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.4% C 0.091 H 244.4°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX#1B557F
RGBrgb(27, 85, 127)
HSLhsl(205, 65%, 30%)
HSVhsv(205, 79%, 50%)
CMYKcmyk(78.7%, 33.1%, 0%, 50.2%)
CIE-LABlab(34.52, -3.02, -28.94)
CIE-LCHlch(34.52, 29.10, 264.04°)
OKLaboklab(43.36% -0.0393 -0.0821)
OKLCHoklch(43.36% 0.091 244.4)
XYZxyz(7.5298, 8.2614, 21.2723)
Luminance0.0826 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B557F #7F451B
analogous
#1B7F77 #1B557F #1B237F
triadic
#1B557F #7F1B55 #557F1B
tetradic
#1B557F #771B7F #7F451B #237F1B
square
#1B557F #771B7F #7F451B #237F1B
split-complementary
#1B557F #7F1B23 #7F771B
monochromatic
#06111A #10334D #1B557F #2677B1 #3E96D6

Accessibility & contrast

On white

7.92
#1B557F on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.65
#1B557F on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B557F
7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B557F#FFFFFF#000000##FFFFFF
##1B557F1.007.922.657.92
#FFFFFF7.921.0021.001.00
#0000002.6521.001.0021.00
##FFFFFF7.921.0021.001.00

Color blindness preview

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

Design tokens & code

CSS
--color: #1b557f;
/* rgb */ color: rgb(27, 85, 127);
/* oklch */ color: oklch(43.4% 0.091 244.4);
Tailwind
colors: {
  custom: {
    50: '#6784a4',
    500: '#1b557f',
    950: '#000000',
  },
}
SCSS
$custom: #1b557f;
$custom-light: #6784a4;
$custom-dark: #000000;
JSON
{
  "hex": "#1b557f",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 127
  },
  "hsl": {
    "h": 205.2,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.43363,
    "c": 0.09103,
    "h": 244.4
  },
  "luminance": 0.08262
}

Semantic roles & 50–950 ramp

primary
#1B557F
secondary
#B37243
accent
#8640E8
background
#F6F8FA
surface
#EBEFF4
border
#C6CACE
text
#070A0F
muted
#7A7C7F

Preview Lab

Preview with #1B557F

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

Preview Lab → · Contrast checker → · Palette generator →

#1B557F Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva