#1B4052#1B4052

#1B4052 is a dark, muted cyan. Relative luminance 0.045; OKLCH L 35.3% C 0.052 H 232.0°. Best body text is #FFFFFF at 11.04:1 contrast (WCAG AA passes).

Color values

HEX	#1B4052
RGB	rgb(27, 64, 82)
HSL	hsl(200, 50%, 21%)
HSV	hsv(200, 67%, 32%)
CMYK	cmyk(67.1%, 22%, 0%, 67.8%)
CIE-LAB	lab(25.29, -6.87, -14.80)
CIE-LCH	lch(25.29, 16.31, 245.09°)
OKLab	oklab(35.3% -0.0323 -0.0414)
OKLCH	oklch(35.3% 0.052 232)
XYZ	xyz(3.8078, 4.5086, 8.6506)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4052 #522D1B

analogous

#1B5249 #1B4052 #1B2552

triadic

#1B4052 #521B40 #40521B

tetradic

#1B4052 #491B52 #522D1B #25521B

square

#1B4052 #491B52 #522D1B #25521B

split-complementary

#1B4052 #521B25 #52491B

monochromatic

#081217 #0C1C24 #1B4052 #2A6480 #3988AE

Accessibility & contrast

On white

11.04

#1B4052 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B4052 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4052

11.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4052	#FFFFFF	#000000	##FFFFFF
##1B4052	1.00	11.04	1.90	11.04
#FFFFFF	11.04	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373F53

Deuteranopia (green-blind)

#2F3952

Tritanopia (blue-blind)

#004546

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b4052;
/* rgb */ color: rgb(27, 64, 82);
/* oklch */ color: oklch(35.3% 0.052 232.0);

Tailwind

colors: {
  custom: {
    50: '#5e7482',
    500: '#1b4052',
    950: '#000000',
  },
}

SCSS

$custom: #1b4052;
$custom-light: #5e7482;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4052",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 82
  },
  "hsl": {
    "h": 199.636,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.35299,
    "c": 0.05245,
    "h": 232
  },
  "luminance": 0.04509
}

Semantic roles & 50–950 ramp

primary

#1B4052

secondary

#885841

accent

#7C4EDA

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#05080A

muted

#797B7C

Preview Lab

Preview with #1B4052

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

Preview Lab → · Contrast checker → · Palette generator →