#1B4B80#1B4B80

#1B4B80 is a dark, moderate cyan. Relative luminance 0.068; OKLCH L 40.9% C 0.103 H 253.5°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX#1B4B80
RGBrgb(27, 75, 128)
HSLhsl(211, 65%, 30%)
HSVhsv(211, 79%, 50%)
CMYKcmyk(78.9%, 41.4%, 0%, 49.8%)
CIE-LABlab(31.40, 3.89, -34.51)
CIE-LCHlch(31.40, 34.73, 276.44°)
OKLaboklab(40.93% -0.0292 -0.0985)
OKLCHoklch(40.93% 0.103 253.5)
XYZxyz(6.8629, 6.8229, 21.3731)
Luminance0.0682 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B4B80 #80501B
analogous
#1B7D80 #1B4B80 #1D1B80
triadic
#1B4B80 #801B4B #4B801B
tetradic
#1B4B80 #801B7D #80501B #1B801D
square
#1B4B80 #801B7D #80501B #1B801D
split-complementary
#1B4B80 #801D1B #7D801B
monochromatic
#06101B #102D4D #1B4B80 #2669B3 #3F87D6

Accessibility & contrast

On white

8.88
#1B4B80 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.36
#1B4B80 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B80
8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B4B80#FFFFFF#000000##FFFFFF
##1B4B801.008.882.368.88
#FFFFFF8.881.0021.001.00
#0000002.3621.001.0021.00
##FFFFFF8.881.0021.001.00

Color blindness preview

Protanopia (red-blind)
#324F82
Deuteranopia (green-blind)
#21467F
Tritanopia (blue-blind)
#00585F
Achromatopsia (no color)
#4A4A4A

Design tokens & code

CSS
--color: #1b4b80;
/* rgb */ color: rgb(27, 75, 128);
/* oklch */ color: oklch(40.9% 0.103 253.5);
Tailwind
colors: {
  custom: {
    50: '#677ca5',
    500: '#1b4b80',
    950: '#000000',
  },
}
SCSS
$custom: #1b4b80;
$custom-light: #677ca5;
$custom-dark: #000000;
JSON
{
  "hex": "#1b4b80",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 128
  },
  "hsl": {
    "h": 211.485,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.40932,
    "c": 0.10278,
    "h": 253.5
  },
  "luminance": 0.06824
}

Semantic roles & 50–950 ramp

primary
#1B4B80
secondary
#B47E43
accent
#9840E8
background
#F6F7FA
surface
#EBEEF4
border
#C6C9CE
text
#07090F
muted
#7A7B7F

Preview Lab

Preview with #1B4B80

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

Preview Lab → · Contrast checker → · Palette generator →

#1B4B80 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva