#00001F#00001F

#00001F is a very dark, moderate blue. Relative luminance 0.001; OKLCH L 10.8% C 0.075 H 264.0°. Best body text is #FFFFFF at 20.59:1 contrast (WCAG AA passes).

Color values

HEX	#00001F
RGB	rgb(0, 0, 31)
HSL	hsl(240, 100%, 6%)
HSV	hsv(240, 100%, 12%)
CMYK	cmyk(100%, 100%, 0%, 87.8%)
CIE-LAB	lab(0.89, 6.28, -16.61)
CIE-LCH	lch(0.89, 17.76, 290.70°)
OKLab	oklab(10.82% -0.0078 -0.0745)
OKLCH	oklch(10.82% 0.075 264)
XYZ	xyz(0.2472, 0.0989, 1.3021)
Luminance	0.0010 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.68

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#00001F #1F1F00

analogous

#000F1F #00001F #0F001F

triadic

#00001F #1F0000 #001F00

tetradic

#00001F #1F000F #1F1F00 #001F0F

square

#00001F #1F000F #1F1F00 #001F0F

split-complementary

#00001F #1F0F00 #0F1F00

monochromatic

#00001F #00001F #00001F #00005C #000099

Accessibility & contrast

On white

20.59

#00001F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.02

#00001F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #00001F

20.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##00001F	#FFFFFF	#000000	##FFFFFF
##00001F	1.00	20.59	1.02	20.59
#FFFFFF	20.59	1.00	21.00	1.00
#000000	1.02	21.00	1.00	21.00
##FFFFFF	20.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000420

Deuteranopia (green-blind)

#00021E

Tritanopia (blue-blind)

#00070D

Achromatopsia (no color)

#030303

Design tokens & code

CSS

--color: #00001f;
/* rgb */ color: rgb(0, 0, 31);
/* oklch */ color: oklch(10.8% 0.075 264.0);

Tailwind

colors: {
  custom: {
    50: '#46475a',
    500: '#00001f',
    950: '#000000',
  },
}

SCSS

$custom: #00001f;
$custom-light: #46475a;
$custom-dark: #000000;

JSON

{
  "hex": "#00001f",
  "rgb": {
    "r": 0,
    "g": 0,
    "b": 31
  },
  "hsl": {
    "h": 240,
    "s": 100,
    "l": 6.078
  },
  "oklch": {
    "l": 0.10816,
    "c": 0.07495,
    "h": 264
  },
  "luminance": 0.00099
}

Semantic roles & 50–950 ramp

primary

#00001F

secondary

#686812

accent

#FF29FF

background

#F3F3F5

surface

#E5E5E9

border

#C1C1C5

text

#000004

muted

#767779

Preview Lab

Preview with #00001F

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

Preview Lab → · Contrast checker → · Palette generator →