#1B455B#1B455B

#1B455B is a dark, muted cyan. Relative luminance 0.052; OKLCH L 37.1% C 0.060 H 234.5°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX#1B455B
RGBrgb(27, 69, 91)
HSLhsl(201, 54%, 23%)
HSVhsv(201, 70%, 36%)
CMYKcmyk(70.3%, 24.2%, 0%, 64.3%)
CIE-LABlab(27.42, -6.70, -17.35)
CIE-LCHlch(27.42, 18.60, 248.88°)
OKLaboklab(37.14% -0.0347 -0.0487)
OKLCHoklch(37.14% 0.06 234.5)
XYZxyz(4.4677, 5.2441, 10.6723)
Luminance0.0524 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1B455B #5B311B
analogous
#1B5B51 #1B455B #1B255B
triadic
#1B455B #5B1B45 #455B1B
tetradic
#1B455B #511B5B #5B311B #255B1B
square
#1B455B #511B5B #5B311B #255B1B
split-complementary
#1B455B #5B1B25 #5B511B
monochromatic
#071218 #0D212C #1B455B #29698A #378DB9

Accessibility & contrast

On white

10.25
#1B455B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.05
#1B455B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B455B
10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1B455B#FFFFFF#000000##FFFFFF
##1B455B1.0010.252.0510.25
#FFFFFF10.251.0021.001.00
#0000002.0521.001.0021.00
##FFFFFF10.251.0021.001.00

Color blindness preview

Protanopia (red-blind)
#3A445C
Deuteranopia (green-blind)
#323E5B
Tritanopia (blue-blind)
#004B4C
Achromatopsia (no color)
#414141

Design tokens & code

CSS
--color: #1b455b;
/* rgb */ color: rgb(27, 69, 91);
/* oklch */ color: oklch(37.1% 0.060 234.5);
Tailwind
colors: {
  custom: {
    50: '#607889',
    500: '#1b455b',
    950: '#000000',
  },
}
SCSS
$custom: #1b455b;
$custom-light: #607889;
$custom-dark: #000000;
JSON
{
  "hex": "#1b455b",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 91
  },
  "hsl": {
    "h": 200.625,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.37136,
    "c": 0.05978,
    "h": 234.5
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary
#1B455B
secondary
#915C41
accent
#7D4ADE
background
#F5F7F8
surface
#EAEDF0
border
#C6C8CB
text
#05090B
muted
#797B7C

Preview Lab

Preview with #1B455B

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

Preview Lab → · Contrast checker → · Palette generator →

#1B455B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva