#1B4255#1B4255

#1B4255 is a dark, muted cyan. Relative luminance 0.048; OKLCH L 36.0% C 0.055 H 232.3°. Best body text is #FFFFFF at 10.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B4255
RGB	rgb(27, 66, 85)
HSL	hsl(200, 52%, 22%)
HSV	hsv(200, 68%, 33%)
CMYK	cmyk(68.2%, 22.4%, 0%, 66.7%)
CIE-LAB	lab(26.11, -7.04, -15.48)
CIE-LCH	lch(26.11, 17.00, 245.56°)
OKLab	oklab(36% -0.0335 -0.0433)
OKLCH	oklch(36% 0.055 232.3)
XYZ	xyz(4.0393, 4.7849, 9.3033)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4255 #552E1B

analogous

#1B554B #1B4255 #1B2555

triadic

#1B4255 #551B42 #42551B

tetradic

#1B4255 #4B1B55 #552E1B #25551B

square

#1B4255 #4B1B55 #552E1B #25551B

split-complementary

#1B4255 #551B25 #554B1B

monochromatic

#071217 #0C1E27 #1B4255 #2A6683 #398AB2

Accessibility & contrast

On white

10.73

#1B4255 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1B4255 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4255

10.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4255	#FFFFFF	#000000	##FFFFFF
##1B4255	1.00	10.73	1.96	10.73
#FFFFFF	10.73	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#394156

Deuteranopia (green-blind)

#313B55

Tritanopia (blue-blind)

#004748

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b4255;
/* rgb */ color: rgb(27, 66, 85);
/* oklch */ color: oklch(36.0% 0.055 232.3);

Tailwind

colors: {
  custom: {
    50: '#5e7685',
    500: '#1b4255',
    950: '#000000',
  },
}

SCSS

$custom: #1b4255;
$custom-light: #5e7685;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4255",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 85
  },
  "hsl": {
    "h": 199.655,
    "s": 51.786,
    "l": 21.961
  },
  "oklch": {
    "l": 0.36003,
    "c": 0.05476,
    "h": 232.3
  },
  "luminance": 0.04785
}

Semantic roles & 50–950 ramp

primary

#1B4255

secondary

#8B5941

accent

#7B4DDB

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1B4255

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

Preview Lab → · Contrast checker → · Palette generator →