#100A0A#100A0A

#100A0A is a very dark, near-neutral red. Relative luminance 0.003; OKLCH L 15.3% C 0.011 H 18.4°. Best body text is #FFFFFF at 19.63:1 contrast (WCAG AA passes).

Color values

HEX	#100A0A
RGB	rgb(16, 10, 10)
HSL	hsl(0, 23%, 5%)
HSV	hsv(0, 38%, 6%)
CMYK	cmyk(0%, 37.5%, 37.5%, 93.7%)
CIE-LAB	lab(3.15, 1.85, 0.65)
CIE-LCH	lch(3.15, 1.96, 19.45°)
OKLab	oklab(15.3% 0.0101 0.0034)
OKLCH	oklch(15.3% 0.011 18.4)
XYZ	xyz(0.3770, 0.3492, 0.3346)
Luminance	0.0035 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A0A #0A1010

analogous

#100A0D #100A0A #100D0A

triadic

#100A0A #0A100A #0A0A10

tetradic

#100A0A #0D100A #0A1010 #0D0A10

square

#100A0A #0D100A #0A1010 #0D0A10

split-complementary

#100A0A #0A100D #0A0D10

monochromatic

#130C0C #130C0C #130C0C #362222 #5B3939

Accessibility & contrast

On white

19.63

#100A0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#100A0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A0A

19.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A0A	#FFFFFF	#000000	##FFFFFF
##100A0A	1.00	19.63	1.07	19.63
#FFFFFF	19.63	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B0B0A

Deuteranopia (green-blind)

#0C0C0A

Tritanopia (blue-blind)

#11090A

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #100a0a;
/* rgb */ color: rgb(16, 10, 10);
/* oklch */ color: oklch(15.3% 0.011 18.4);

Tailwind

colors: {
  custom: {
    50: '#4e4b4b',
    500: '#100a0a',
    950: '#000000',
  },
}

SCSS

$custom: #100a0a;
$custom-light: #4e4b4b;
$custom-dark: #000000;

JSON

{
  "hex": "#100a0a",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 10
  },
  "hsl": {
    "h": 0,
    "s": 23.077,
    "l": 5.098
  },
  "oklch": {
    "l": 0.15296,
    "c": 0.01061,
    "h": 18.4
  },
  "luminance": 0.00349
}

Semantic roles & 50–950 ramp

primary

#100A0A

secondary

#314444

accent

#C0C068

background

#F4F4F4

surface

#E7E7E7

border

#C3C3C3

text

#010101

muted

#777777

Preview Lab

Preview with #100A0A

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

Preview Lab → · Contrast checker → · Palette generator →