#1B4B59#1B4B59

#1B4B59 is a dark, muted cyan. Relative luminance 0.060; OKLCH L 38.7% C 0.056 H 220.3°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX#1B4B59
RGBrgb(27, 75, 89)
HSLhsl(194, 53%, 23%)
HSVhsv(194, 70%, 35%)
CMYKcmyk(69.7%, 15.7%, 0%, 65.1%)
CIE-LABlab(29.38, -11.15, -13.05)
CIE-LCHlch(29.38, 17.17, 229.48°)
OKLaboklab(38.67% -0.0428 -0.0363)
OKLCHoklch(38.67% 0.056 220.3)
XYZxyz(4.7705, 5.9859, 10.3532)
Luminance0.0599 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B4B59 #59291B
analogous
#1B5948 #1B4B59 #1B2C59
triadic
#1B4B59 #591B4B #4B591B
tetradic
#1B4B59 #481B59 #59291B #2C591B
square
#1B4B59 #481B59 #59291B #2C591B
split-complementary
#1B4B59 #591B2C #59481B
monochromatic
#071417 #0D232A #1B4B59 #297388 #379AB7

Accessibility & contrast

On white

9.56
#1B4B59 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.20
#1B4B59 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B59
9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B4B59#FFFFFF#000000##FFFFFF
##1B4B591.009.562.209.56
#FFFFFF9.561.0021.001.00
#0000002.2021.001.0021.00
##FFFFFF9.561.0021.001.00

Color blindness preview

Protanopia (red-blind)
#42495A
Deuteranopia (green-blind)
#3A4259
Tritanopia (blue-blind)
#00504F
Achromatopsia (no color)
#454545

Design tokens & code

CSS
--color: #1b4b59;
/* rgb */ color: rgb(27, 75, 89);
/* oklch */ color: oklch(38.7% 0.056 220.3);
Tailwind
colors: {
  custom: {
    50: '#607d88',
    500: '#1b4b59',
    950: '#000000',
  },
}
SCSS
$custom: #1b4b59;
$custom-light: #607d88;
$custom-dark: #000000;
JSON
{
  "hex": "#1b4b59",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 89
  },
  "hsl": {
    "h": 193.548,
    "s": 53.448,
    "l": 22.745
  },
  "oklch": {
    "l": 0.38669,
    "c": 0.05615,
    "h": 220.3
  },
  "luminance": 0.05986
}

Semantic roles & 50–950 ramp

primary
#1B4B59
secondary
#8F5341
accent
#6C4BDD
background
#F5F7F8
surface
#EAEEEF
border
#C6C9CA
text
#05090B
muted
#797B7C

Preview Lab

Preview with #1B4B59

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

Preview Lab → · Contrast checker → · Palette generator →

#1B4B59 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva