#1B4E5B#1B4E5B

#1B4E5B is a dark, muted cyan. Relative luminance 0.064; OKLCH L 39.6% C 0.058 H 217.7°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E5B
RGB	rgb(27, 78, 91)
HSL	hsl(192, 54%, 23%)
HSV	hsv(192, 70%, 36%)
CMYK	cmyk(70.3%, 14.3%, 0%, 64.3%)
CIE-LAB	lab(30.49, -12.24, -12.63)
CIE-LCH	lch(30.49, 17.59, 225.90°)
OKLab	oklab(39.59% -0.0455 -0.0352)
OKLCH	oklch(39.59% 0.058 217.7)
XYZ	xyz(5.0639, 6.4366, 10.8710)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E5B #5B281B

analogous

#1B5B48 #1B4E5B #1B2E5B

triadic

#1B4E5B #5B1B4E #4E5B1B

tetradic

#1B4E5B #481B5B #5B281B #2E5B1B

square

#1B4E5B #481B5B #5B281B #2E5B1B

split-complementary

#1B4E5B #5B1B2E #5B481B

monochromatic

#071418 #0D262C #1B4E5B #29768A #379FB9

Accessibility & contrast

On white

9.18

#1B4E5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1B4E5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E5B

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E5B	#FFFFFF	#000000	##FFFFFF
##1B4E5B	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)

#464C5C

Deuteranopia (green-blind)

#3C455B

Tritanopia (blue-blind)

#005352

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4e5b;
/* rgb */ color: rgb(27, 78, 91);
/* oklch */ color: oklch(39.6% 0.058 217.7);

Tailwind

colors: {
  custom: {
    50: '#607f89',
    500: '#1b4e5b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e5b;
$custom-light: #607f89;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e5b",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 91
  },
  "hsl": {
    "h": 192.188,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.39588,
    "c": 0.0575,
    "h": 217.7
  },
  "luminance": 0.06437
}

Semantic roles & 50–950 ramp

primary

#1B4E5B

secondary

#915141

accent

#684ADE

background

#F5F7F8

surface

#EAEEF0

border

#C6C9CB

text

#050A0B

muted

#797C7C

Preview Lab

Preview with #1B4E5B

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

Preview Lab → · Contrast checker → · Palette generator →