#1B4753#1B4753

#1B4753 is a dark, muted cyan. Relative luminance 0.054; OKLCH L 37.3% C 0.052 H 218.6°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#1B4753
RGB	rgb(27, 71, 83)
HSL	hsl(193, 51%, 22%)
HSV	hsv(193, 67%, 33%)
CMYK	cmyk(67.5%, 14.5%, 0%, 67.5%)
CIE-LAB	lab(27.75, -10.87, -11.67)
CIE-LCH	lch(27.75, 15.95, 227.03°)
OKLab	oklab(37.28% -0.0406 -0.0325)
OKLCH	oklch(37.28% 0.052 218.6)
XYZ	xyz(4.2659, 5.3636, 8.9924)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4753 #53271B

analogous

#1B5343 #1B4753 #1B2B53

triadic

#1B4753 #531B47 #47531B

tetradic

#1B4753 #431B53 #53271B #2B531B

square

#1B4753 #431B53 #53271B #2B531B

split-complementary

#1B4753 #531B2B #53431B

monochromatic

#081417 #0C1F25 #1B4753 #2A6F81 #3996AF

Accessibility & contrast

On white

10.13

#1B4753 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1B4753 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4753

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4753	#FFFFFF	#000000	##FFFFFF
##1B4753	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F4554

Deuteranopia (green-blind)

#373F53

Tritanopia (blue-blind)

#004B4B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b4753;
/* rgb */ color: rgb(27, 71, 83);
/* oklch */ color: oklch(37.3% 0.052 218.6);

Tailwind

colors: {
  custom: {
    50: '#5e7a83',
    500: '#1b4753',
    950: '#000000',
  },
}

SCSS

$custom: #1b4753;
$custom-light: #5e7a83;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4753",
  "rgb": {
    "r": 27,
    "g": 71,
    "b": 83
  },
  "hsl": {
    "h": 192.857,
    "s": 50.909,
    "l": 21.569
  },
  "oklch": {
    "l": 0.37279,
    "c": 0.05198,
    "h": 218.6
  },
  "luminance": 0.05364
}

Semantic roles & 50–950 ramp

primary

#1B4753

secondary

#895041

accent

#6C4DDA

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#05090A

muted

#797B7C

Preview Lab

Preview with #1B4753

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

Preview Lab → · Contrast checker → · Palette generator →