#1B555B#1B555B

#1B555B is a dark, muted teal. Relative luminance 0.075; OKLCH L 41.5% C 0.059 H 204.9°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B555B
RGB	rgb(27, 85, 91)
HSL	hsl(186, 54%, 23%)
HSV	hsv(186, 70%, 36%)
CMYK	cmyk(70.3%, 6.6%, 0%, 64.3%)
CIE-LAB	lab(32.89, -16.29, -8.99)
CIE-LCH	lch(32.89, 18.61, 208.89°)
OKLab	oklab(41.52% -0.0538 -0.0249)
OKLCH	oklch(41.52% 0.059 204.9)
XYZ	xyz(5.5880, 7.4847, 11.0457)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B555B #5B211B

analogous

#1B5B41 #1B555B #1B355B

triadic

#1B555B #5B1B55 #555B1B

tetradic

#1B555B #411B5B #5B211B #355B1B

square

#1B555B #411B5B #5B211B #355B1B

split-complementary

#1B555B #5B1B35 #5B411B

monochromatic

#071618 #0D292C #1B555B #29818A #37ADB9

Accessibility & contrast

On white

8.41

#1B555B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1B555B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B555B

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B555B	#FFFFFF	#000000	##FFFFFF
##1B555B	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E515B

Deuteranopia (green-blind)

#444A5B

Tritanopia (blue-blind)

#005957

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b555b;
/* rgb */ color: rgb(27, 85, 91);
/* oklch */ color: oklch(41.5% 0.059 204.9);

Tailwind

colors: {
  custom: {
    50: '#618589',
    500: '#1b555b',
    950: '#000000',
  },
}

SCSS

$custom: #1b555b;
$custom-light: #618589;
$custom-dark: #000000;

JSON

{
  "hex": "#1b555b",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 91
  },
  "hsl": {
    "h": 185.625,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.41518,
    "c": 0.05932,
    "h": 204.9
  },
  "luminance": 0.07485
}

Semantic roles & 50–950 ramp

primary

#1B555B

secondary

#914941

accent

#584ADE

background

#F6F8F8

surface

#EBEFF0

border

#C6CACB

text

#050B0B

muted

#7A7C7C

Preview Lab

Preview with #1B555B

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

Preview Lab → · Contrast checker → · Palette generator →