#1B4252#1B4252

#1B4252 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 35.8% C 0.052 H 227.8°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B4252
RGB	rgb(27, 66, 82)
HSL	hsl(197, 50%, 21%)
HSV	hsv(197, 67%, 32%)
CMYK	cmyk(67.1%, 19.5%, 0%, 67.8%)
CIE-LAB	lab(25.98, -8.14, -13.73)
CIE-LCH	lch(25.98, 15.97, 239.34°)
OKLab	oklab(35.85% -0.0348 -0.0383)
OKLCH	oklch(35.85% 0.052 227.8)
XYZ	xyz(3.9226, 4.7382, 8.6889)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4252 #522B1B

analogous

#1B5247 #1B4252 #1B2752

triadic

#1B4252 #521B42 #42521B

tetradic

#1B4252 #471B52 #522B1B #27521B

square

#1B4252 #471B52 #522B1B #27521B

split-complementary

#1B4252 #521B27 #52471B

monochromatic

#081317 #0C1D24 #1B4252 #2A6780 #398CAE

Accessibility & contrast

On white

10.78

#1B4252 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1B4252 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4252

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4252	#FFFFFF	#000000	##FFFFFF
##1B4252	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A4153

Deuteranopia (green-blind)

#323B52

Tritanopia (blue-blind)

#004747

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b4252;
/* rgb */ color: rgb(27, 66, 82);
/* oklch */ color: oklch(35.8% 0.052 227.8);

Tailwind

colors: {
  custom: {
    50: '#5e7682',
    500: '#1b4252',
    950: '#000000',
  },
}

SCSS

$custom: #1b4252;
$custom-light: #5e7682;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4252",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 82
  },
  "hsl": {
    "h": 197.455,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.35848,
    "c": 0.05176,
    "h": 227.8
  },
  "luminance": 0.04739
}

Semantic roles & 50–950 ramp

primary

#1B4252

secondary

#885641

accent

#774EDA

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#05080A

muted

#797B7C

Preview Lab

Preview with #1B4252

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

Preview Lab → · Contrast checker → · Palette generator →