#1B6388#1B6388

#1B6388 is a mid, moderate cyan. Relative luminance 0.109; OKLCH L 47.4% C 0.091 H 236.3°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX#1B6388
RGBrgb(27, 99, 136)
HSLhsl(200, 67%, 32%)
HSVhsv(200, 80%, 53%)
CMYKcmyk(80.1%, 27.2%, 0%, 46.7%)
CIE-LABlab(39.47, -8.22, -26.68)
CIE-LCHlch(39.47, 27.92, 252.87°)
OKLaboklab(47.43% -0.0503 -0.0753)
OKLCHoklch(47.43% 0.091 236.3)
XYZxyz(9.3560, 10.9331, 24.9050)
Luminance0.1093 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B6388 #88401B
analogous
#1B8877 #1B6388 #1B2D88
triadic
#1B6388 #881B63 #63881B
tetradic
#1B6388 #771B88 #88401B #2D881B
square
#1B6388 #771B88 #88401B #2D881B
split-complementary
#1B6388 #881B2D #88771B
monochromatic
#071922 #113E55 #1B6388 #2588BB #44A7DA

Accessibility & contrast

On white

6.59
#1B6388 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.19
#1B6388 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B6388
6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B6388#FFFFFF#000000##FFFFFF
##1B63881.006.593.196.59
#FFFFFF6.591.0021.001.00
#0000003.1921.001.0021.00
##FFFFFF6.591.0021.001.00

Color blindness preview

Protanopia (red-blind)
#51638A
Deuteranopia (green-blind)
#425887
Tritanopia (blue-blind)
#006D70
Achromatopsia (no color)
#5D5D5D

Design tokens & code

CSS
--color: #1b6388;
/* rgb */ color: rgb(27, 99, 136);
/* oklch */ color: oklch(47.4% 0.091 236.3);
Tailwind
colors: {
  custom: {
    50: '#6a8fab',
    500: '#1b6388',
    950: '#000000',
  },
}
SCSS
$custom: #1b6388;
$custom-light: #6a8fab;
$custom-dark: #000000;
JSON
{
  "hex": "#1b6388",
  "rgb": {
    "r": 27,
    "g": 99,
    "b": 136
  },
  "hsl": {
    "h": 200.367,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.47433,
    "c": 0.09059,
    "h": 236.3
  },
  "luminance": 0.10934
}

Semantic roles & 50–950 ramp

primary
#1B6388
secondary
#BB6C44
accent
#783EEA
background
#F6F8FA
surface
#ECF0F4
border
#C7CBCE
text
#070C10
muted
#7A7D7F

Preview Lab

Preview with #1B6388

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

Preview Lab → · Contrast checker → · Palette generator →

#1B6388 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva