#001B2B#001B2B

#001B2B is a very dark, muted cyan. Relative luminance 0.010; OKLCH L 21.1% C 0.046 H 237.6°. Best body text is #FFFFFF at 17.62:1 contrast (WCAG AA passes).

Color values

HEX	#001B2B
RGB	rgb(0, 27, 43)
HSL	hsl(202, 100%, 8%)
HSV	hsv(202, 100%, 17%)
CMYK	cmyk(100%, 37.2%, 0%, 83.1%)
CIE-LAB	lab(8.64, -3.32, -13.80)
CIE-LCH	lch(8.64, 14.20, 256.46°)
OKLab	oklab(21.07% -0.0249 -0.0392)
OKLCH	oklch(21.07% 0.046 237.6)
XYZ	xyz(0.8278, 0.9582, 2.4263)
Luminance	0.0096 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#001B2B #2B1000

analogous

#002B25 #001B2B #00052B

triadic

#001B2B #2B001B #1B2B00

tetradic

#001B2B #25002B #2B1000 #052B00

square

#001B2B #25002B #2B1000 #052B00

split-complementary

#001B2B #2B0005 #2B2500

monochromatic

#00131F #00131F #001B2B #004168 #0068A5

Accessibility & contrast

On white

17.62

#001B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#001B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #001B2B

17.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##001B2B	#FFFFFF	#000000	##FFFFFF
##001B2B	1.00	17.62	1.19	17.62
#FFFFFF	17.62	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#131B2C

Deuteranopia (green-blind)

#0D172B

Tritanopia (blue-blind)

#001F21

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #001b2b;
/* rgb */ color: rgb(0, 27, 43);
/* oklch */ color: oklch(21.1% 0.046 237.6);

Tailwind

colors: {
  custom: {
    50: '#485764',
    500: '#001b2b',
    950: '#000000',
  },
}

SCSS

$custom: #001b2b;
$custom-light: #485764;
$custom-dark: #000000;

JSON

{
  "hex": "#001b2b",
  "rgb": {
    "r": 0,
    "g": 27,
    "b": 43
  },
  "hsl": {
    "h": 202.326,
    "s": 100,
    "l": 8.431
  },
  "oklch": {
    "l": 0.21071,
    "c": 0.04642,
    "h": 237.6
  },
  "luminance": 0.00958
}

Semantic roles & 50–950 ramp

primary

#001B2B

secondary

#733714

accent

#7929FF

background

#F4F5F6

surface

#E7E9EB

border

#C3C5C6

text

#010305

muted

#77787A

Preview Lab

Preview with #001B2B

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

Preview Lab → · Contrast checker → · Palette generator →