#00101B#00101B

#00101B is a very dark, muted cyan. Relative luminance 0.004; OKLCH L 16.4% C 0.035 H 235.9°. Best body text is #FFFFFF at 19.27:1 contrast (WCAG AA passes).

Color values

HEX	#00101B
RGB	rgb(0, 16, 27)
HSL	hsl(204, 100%, 5%)
HSV	hsv(204, 100%, 11%)
CMYK	cmyk(100%, 40.7%, 0%, 89.4%)
CIE-LAB	lab(4.06, -1.82, -8.69)
CIE-LCH	lch(4.06, 8.88, 258.17°)
OKLab	oklab(16.36% -0.0197 -0.0291)
OKLCH	oklch(16.36% 0.035 235.9)
XYZ	xyz(0.3830, 0.4497, 1.1033)
Luminance	0.0045 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#00101B #1B0B00

analogous

#001B18 #00101B #00031B

triadic

#00101B #1B0010 #101B00

tetradic

#00101B #18001B #1B0B00 #031B00

square

#00101B #18001B #1B0B00 #031B00

split-complementary

#00101B #1B0003 #1B1800

monochromatic

#00121F #00121F #00121F #003458 #005995

Accessibility & contrast

On white

19.27

#00101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#00101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #00101B

19.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##00101B	#FFFFFF	#000000	##FFFFFF
##00101B	1.00	19.27	1.09	19.27
#FFFFFF	19.27	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B101B

Deuteranopia (green-blind)

#060D1B

Tritanopia (blue-blind)

#001314

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #00101b;
/* rgb */ color: rgb(0, 16, 27);
/* oklch */ color: oklch(16.4% 0.035 235.9);

Tailwind

colors: {
  custom: {
    50: '#464e57',
    500: '#00101b',
    950: '#000000',
  },
}

SCSS

$custom: #00101b;
$custom-light: #464e57;
$custom-dark: #000000;

JSON

{
  "hex": "#00101b",
  "rgb": {
    "r": 0,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 204.444,
    "s": 100,
    "l": 5.294
  },
  "oklch": {
    "l": 0.16362,
    "c": 0.03516,
    "h": 235.9
  },
  "luminance": 0.0045
}

Semantic roles & 50–950 ramp

primary

#00101B

secondary

#653412

accent

#8029FF

background

#F3F4F5

surface

#E5E7E9

border

#C1C3C5

text

#000103

muted

#767778

Preview Lab

Preview with #00101B

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

Preview Lab → · Contrast checker → · Palette generator →