#1B4F80#1B4F80

#1B4F80 is a dark, moderate cyan. Relative luminance 0.074; OKLCH L 41.9% C 0.098 H 250.4°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX#1B4F80
RGBrgb(27, 79, 128)
HSLhsl(209, 65%, 30%)
HSVhsv(209, 79%, 50%)
CMYKcmyk(78.9%, 38.3%, 0%, 49.8%)
CIE-LABlab(32.66, 1.25, -32.50)
CIE-LCHlch(32.66, 32.53, 272.19°)
OKLaboklab(41.92% -0.0331 -0.0926)
OKLCHoklch(41.92% 0.098 250.4)
XYZxyz(7.1428, 7.3827, 21.4664)
Luminance0.0738 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B4F80 #804C1B
analogous
#1B807E #1B4F80 #1B1C80
triadic
#1B4F80 #801B4F #4F801B
tetradic
#1B4F80 #7E1B80 #804C1B #1C801B
square
#1B4F80 #7E1B80 #804C1B #1C801B
split-complementary
#1B4F80 #801B1C #807E1B
monochromatic
#06111B #10304D #1B4F80 #266EB3 #3F8DD6

Accessibility & contrast

On white

8.48
#1B4F80 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.48
#1B4F80 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F80
8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B4F80#FFFFFF#000000##FFFFFF
##1B4F801.008.482.488.48
#FFFFFF8.481.0021.001.00
#0000002.4821.001.0021.00
##FFFFFF8.481.0021.001.00

Color blindness preview

Protanopia (red-blind)
#385282
Deuteranopia (green-blind)
#29497F
Tritanopia (blue-blind)
#005B61
Achromatopsia (no color)
#4D4D4D

Design tokens & code

CSS
--color: #1b4f80;
/* rgb */ color: rgb(27, 79, 128);
/* oklch */ color: oklch(41.9% 0.098 250.4);
Tailwind
colors: {
  custom: {
    50: '#6780a5',
    500: '#1b4f80',
    950: '#000000',
  },
}
SCSS
$custom: #1b4f80;
$custom-light: #6780a5;
$custom-dark: #000000;
JSON
{
  "hex": "#1b4f80",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 128
  },
  "hsl": {
    "h": 209.109,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.41919,
    "c": 0.09832,
    "h": 250.4
  },
  "luminance": 0.07383
}

Semantic roles & 50–950 ramp

primary
#1B4F80
secondary
#B47A43
accent
#9140E8
background
#F6F7FA
surface
#EBEEF4
border
#C6C9CE
text
#070A0F
muted
#7A7C7F

Preview Lab

Preview with #1B4F80

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

Preview Lab → · Contrast checker → · Palette generator →

#1B4F80 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva