#0A0000#0A0000

#0A0000 is a very dark, muted red. Relative luminance 0.001; OKLCH L 9.1% C 0.037 H 29.2°. Best body text is #FFFFFF at 20.73:1 contrast (WCAG AA passes).

Color values

HEX	#0A0000
RGB	rgb(10, 0, 0)
HSL	hsl(0, 100%, 2%)
HSV	hsv(0, 100%, 4%)
CMYK	cmyk(0%, 100%, 100%, 96.1%)
CIE-LAB	lab(0.58, 2.61, 0.92)
CIE-LCH	lch(0.58, 2.77, 19.43°)
OKLab	oklab(9.09% 0.0326 0.0182)
OKLCH	oklch(9.09% 0.037 29.2)
XYZ	xyz(0.1252, 0.0646, 0.0059)
Luminance	0.0006 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0000 #000A0A

analogous

#0A0005 #0A0000 #0A0500

triadic

#0A0000 #000A00 #00000A

tetradic

#0A0000 #050A00 #000A0A #05000A

square

#0A0000 #050A00 #000A0A #05000A

split-complementary

#0A0000 #000A05 #00050A

monochromatic

#1F0000 #1F0000 #1F0000 #470000 #840000

Accessibility & contrast

On white

20.73

#0A0000 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.01

#0A0000 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0000

20.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0000	#FFFFFF	#000000	##FFFFFF
##0A0000	1.00	20.73	1.01	20.73
#FFFFFF	20.73	1.00	21.00	1.00
#000000	1.01	21.00	1.00	21.00
##FFFFFF	20.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#020100

Deuteranopia (green-blind)

#040300

Tritanopia (blue-blind)

#0C0000

Achromatopsia (no color)

#020202

Design tokens & code

CSS

--color: #0a0000;
/* rgb */ color: rgb(10, 0, 0);
/* oklch */ color: oklch(9.1% 0.037 29.2);

Tailwind

colors: {
  custom: {
    50: '#4b4747',
    500: '#0a0000',
    950: '#000000',
  },
}

SCSS

$custom: #0a0000;
$custom-light: #4b4747;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0000",
  "rgb": {
    "r": 10,
    "g": 0,
    "b": 0
  },
  "hsl": {
    "h": 0,
    "s": 100,
    "l": 1.961
  },
  "oklch": {
    "l": 0.09092,
    "c": 0.03731,
    "h": 29.2
  },
  "luminance": 0.00065
}

Semantic roles & 50–950 ramp

primary

#0A0000

secondary

#0F5757

accent

#FFFF29

background

#F4F3F3

surface

#E7E5E5

border

#C3C1C1

text

#010000

muted

#777777

Preview Lab

Preview with #0A0000

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

Preview Lab → · Contrast checker → · Palette generator →