#00001B#00001B

#00001B is a very dark, moderate blue. Relative luminance 0.001; OKLCH L 10.0% C 0.070 H 264.1°. Best body text is #FFFFFF at 20.67:1 contrast (WCAG AA passes).

Color values

HEX	#00001B
RGB	rgb(0, 0, 27)
HSL	hsl(240, 100%, 5%)
HSV	hsv(240, 100%, 11%)
CMYK	cmyk(100%, 100%, 0%, 89.4%)
CIE-LAB	lab(0.71, 5.02, -13.64)
CIE-LCH	lch(0.71, 14.53, 290.22°)
OKLab	oklab(10.04% -0.0072 -0.0692)
OKLCH	oklch(10.04% 0.07 264.1)
XYZ	xyz(0.1978, 0.0791, 1.0415)
Luminance	0.0008 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 9.58

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#00001B #1B1B00

analogous

#000D1B #00001B #0D001B

triadic

#00001B #1B0000 #001B00

tetradic

#00001B #1B000D #1B1B00 #001B0D

square

#00001B #1B000D #1B1B00 #001B0D

split-complementary

#00001B #1B0D00 #0D1B00

monochromatic

#00001F #00001F #00001F #000058 #000095

Accessibility & contrast

On white

20.67

#00001B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.02

#00001B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #00001B

20.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##00001B	#FFFFFF	#000000	##FFFFFF
##00001B	1.00	20.67	1.02	20.67
#FFFFFF	20.67	1.00	21.00	1.00
#000000	1.02	21.00	1.00	21.00
##FFFFFF	20.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00041C

Deuteranopia (green-blind)

#00021A

Tritanopia (blue-blind)

#00050B

Achromatopsia (no color)

#030303

Design tokens & code

CSS

--color: #00001b;
/* rgb */ color: rgb(0, 0, 27);
/* oklch */ color: oklch(10.0% 0.070 264.1);

Tailwind

colors: {
  custom: {
    50: '#464757',
    500: '#00001b',
    950: '#000000',
  },
}

SCSS

$custom: #00001b;
$custom-light: #464757;
$custom-dark: #000000;

JSON

{
  "hex": "#00001b",
  "rgb": {
    "r": 0,
    "g": 0,
    "b": 27
  },
  "hsl": {
    "h": 240,
    "s": 100,
    "l": 5.294
  },
  "oklch": {
    "l": 0.10041,
    "c": 0.06957,
    "h": 264.1
  },
  "luminance": 0.00079
}

Semantic roles & 50–950 ramp

primary

#00001B

secondary

#656512

accent

#FF29FF

background

#F3F3F5

surface

#E5E5E9

border

#C1C1C5

text

#000003

muted

#767778

Preview Lab

Preview with #00001B

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

Preview Lab → · Contrast checker → · Palette generator →