#01011B#01011B

#01011B is a very dark, moderate blue. Relative luminance 0.001; OKLCH L 10.9% C 0.064 H 269.1°. Best body text is #FFFFFF at 20.56:1 contrast (WCAG AA passes).

Color values

HEX	#01011B
RGB	rgb(1, 1, 27)
HSL	hsl(240, 93%, 5%)
HSV	hsv(240, 96%, 11%)
CMYK	cmyk(96.3%, 96.3%, 0%, 89.4%)
CIE-LAB	lab(0.97, 4.88, -13.25)
CIE-LCH	lch(0.97, 14.12, 290.21°)
OKLab	oklab(10.9% -0.001 -0.0638)
OKLCH	oklch(10.9% 0.064 269.1)
XYZ	xyz(0.2211, 0.1073, 1.0457)
Luminance	0.0011 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 9.82

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#01011B #1B1B01

analogous

#010E1B #01011B #0E011B

triadic

#01011B #1B0101 #011B01

tetradic

#01011B #1B010E #1B1B01 #011B0E

square

#01011B #1B010E #1B1B01 #011B0E

split-complementary

#01011B #1B0E01 #0E1B01

monochromatic

#01011E #01011E #01011E #030356 #050591

Accessibility & contrast

On white

20.56

#01011B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.02

#01011B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #01011B

20.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##01011B	#FFFFFF	#000000	##FFFFFF
##01011B	1.00	20.56	1.02	20.56
#FFFFFF	20.56	1.00	21.00	1.00
#000000	1.02	21.00	1.00	21.00
##FFFFFF	20.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00041C

Deuteranopia (green-blind)

#00031A

Tritanopia (blue-blind)

#00060C

Achromatopsia (no color)

#040404

Design tokens & code

CSS

--color: #01011b;
/* rgb */ color: rgb(1, 1, 27);
/* oklch */ color: oklch(10.9% 0.064 269.1);

Tailwind

colors: {
  custom: {
    50: '#464757',
    500: '#01011b',
    950: '#000000',
  },
}

SCSS

$custom: #01011b;
$custom-light: #464757;
$custom-dark: #000000;

JSON

{
  "hex": "#01011b",
  "rgb": {
    "r": 1,
    "g": 1,
    "b": 27
  },
  "hsl": {
    "h": 240,
    "s": 92.857,
    "l": 5.49
  },
  "oklch": {
    "l": 0.10895,
    "c": 0.06382,
    "h": 269.1
  },
  "luminance": 0.00107
}

Semantic roles & 50–950 ramp

primary

#01011B

secondary

#636315

accent

#FF29FF

background

#F3F3F5

surface

#E5E5E9

border

#C1C1C5

text

#000003

muted

#767778

Preview Lab

Preview with #01011B

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

Preview Lab → · Contrast checker → · Palette generator →