#1B4E59#1B4E59

#1B4E59 is a dark, muted cyan. Relative luminance 0.064; OKLCH L 39.5% C 0.056 H 214.5°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E59
RGB	rgb(27, 78, 89)
HSL	hsl(191, 53%, 23%)
HSV	hsv(191, 70%, 35%)
CMYK	cmyk(69.7%, 12.4%, 0%, 65.1%)
CIE-LAB	lab(30.41, -12.94, -11.48)
CIE-LCH	lch(30.41, 17.30, 221.57°)
OKLab	oklab(39.5% -0.0464 -0.0319)
OKLCH	oklch(39.5% 0.056 214.5)
XYZ	xyz(4.9788, 6.4025, 10.4227)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E59 #59261B

analogous

#1B5945 #1B4E59 #1B2F59

triadic

#1B4E59 #591B4E #4E591B

tetradic

#1B4E59 #451B59 #59261B #2F591B

square

#1B4E59 #451B59 #59261B #2F591B

split-complementary

#1B4E59 #591B2F #59451B

monochromatic

#071517 #0D252A #1B4E59 #297788 #37A0B7

Accessibility & contrast

On white

9.21

#1B4E59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1B4E59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E59

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E59	#FFFFFF	#000000	##FFFFFF
##1B4E59	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#464B5A

Deuteranopia (green-blind)

#3D4559

Tritanopia (blue-blind)

#005251

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4e59;
/* rgb */ color: rgb(27, 78, 89);
/* oklch */ color: oklch(39.5% 0.056 214.5);

Tailwind

colors: {
  custom: {
    50: '#607f87',
    500: '#1b4e59',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e59;
$custom-light: #607f87;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e59",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 89
  },
  "hsl": {
    "h": 190.645,
    "s": 53.448,
    "l": 22.745
  },
  "oklch": {
    "l": 0.39495,
    "c": 0.05632,
    "h": 214.5
  },
  "luminance": 0.06403
}

Semantic roles & 50–950 ramp

primary

#1B4E59

secondary

#8F4F41

accent

#654BDD

background

#F5F7F8

surface

#EAEEEF

border

#C6C9CA

text

#050A0B

muted

#797C7C

Preview Lab

Preview with #1B4E59

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

Preview Lab → · Contrast checker → · Palette generator →