#1B4D63#1B4D63

#1B4D63 is a dark, moderate cyan. Relative luminance 0.064; OKLCH L 39.7% C 0.064 H 230.5°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D63
RGB	rgb(27, 77, 99)
HSL	hsl(198, 57%, 25%)
HSV	hsv(198, 73%, 39%)
CMYK	cmyk(72.7%, 22.2%, 0%, 61.2%)
CIE-LAB	lab(30.50, -8.72, -17.71)
CIE-LCH	lch(30.50, 19.74, 243.78°)
OKLab	oklab(39.71% -0.0409 -0.0496)
OKLCH	oklch(39.71% 0.064 230.5)
XYZ	xyz(5.3571, 6.4410, 12.7629)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D63 #63311B

analogous

#1B6355 #1B4D63 #1B2963

triadic

#1B4D63 #631B4D #4D631B

tetradic

#1B4D63 #551B63 #63311B #29631B

square

#1B4D63 #551B63 #63311B #29631B

split-complementary

#1B4D63 #631B29 #63551B

monochromatic

#071318 #0E2833 #1B4D63 #287293 #3598C3

Accessibility & contrast

On white

9.18

#1B4D63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1B4D63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D63

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D63	#FFFFFF	#000000	##FFFFFF
##1B4D63	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#424C64

Deuteranopia (green-blind)

#384563

Tritanopia (blue-blind)

#005354

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4d63;
/* rgb */ color: rgb(27, 77, 99);
/* oklch */ color: oklch(39.7% 0.064 230.5);

Tailwind

colors: {
  custom: {
    50: '#617e8f',
    500: '#1b4d63',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d63;
$custom-light: #617e8f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d63",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 99
  },
  "hsl": {
    "h": 198.333,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.39713,
    "c": 0.06431,
    "h": 230.5
  },
  "luminance": 0.06442
}

Semantic roles & 50–950 ramp

primary

#1B4D63

secondary

#985C41

accent

#7647E0

background

#F6F7F8

surface

#EBEEF0

border

#C6C9CB

text

#050A0C

muted

#7A7C7D

Preview Lab

Preview with #1B4D63

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

Preview Lab → · Contrast checker → · Palette generator →