#100404#100404

#100404 is a very dark, muted red. Relative luminance 0.002; OKLCH L 13.0% C 0.026 H 21.2°. Best body text is #FFFFFF at 20.17:1 contrast (WCAG AA passes).

Color values

HEX	#100404
RGB	rgb(16, 4, 4)
HSL	hsl(0, 60%, 4%)
HSV	hsv(0, 75%, 6%)
CMYK	cmyk(0%, 75%, 75%, 93.7%)
CIE-LAB	lab(1.86, 3.42, 1.20)
CIE-LCH	lch(1.86, 3.62, 19.42°)
OKLab	oklab(13.03% 0.024 0.0093)
OKLCH	oklch(13.03% 0.026 21.2)
XYZ	xyz(0.2790, 0.2058, 0.1399)
Luminance	0.0021 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100404 #041010

analogous

#10040A #100404 #100A04

triadic

#100404 #041004 #040410

tetradic

#100404 #0A1004 #041010 #0A0410

square

#100404 #0A1004 #041010 #0A0410

split-complementary

#100404 #04100A #040A10

monochromatic

#180606 #180606 #180606 #411010 #721C1C

Accessibility & contrast

On white

20.17

#100404 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.04

#100404 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100404

20.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100404	#FFFFFF	#000000	##FFFFFF
##100404	1.00	20.17	1.04	20.17
#FFFFFF	20.17	1.00	21.00	1.00
#000000	1.04	21.00	1.00	21.00
##FFFFFF	20.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#060504

Deuteranopia (green-blind)

#090804

Tritanopia (blue-blind)

#120304

Achromatopsia (no color)

#070707

Design tokens & code

CSS

--color: #100404;
/* rgb */ color: rgb(16, 4, 4);
/* oklch */ color: oklch(13.0% 0.026 21.2);

Tailwind

colors: {
  custom: {
    50: '#4e4848',
    500: '#100404',
    950: '#000000',
  },
}

SCSS

$custom: #100404;
$custom-light: #4e4848;
$custom-dark: #000000;

JSON

{
  "hex": "#100404",
  "rgb": {
    "r": 16,
    "g": 4,
    "b": 4
  },
  "hsl": {
    "h": 0,
    "s": 60,
    "l": 3.922
  },
  "oklch": {
    "l": 0.13026,
    "c": 0.02572,
    "h": 21.2
  },
  "luminance": 0.00206
}

Semantic roles & 50–950 ramp

primary

#100404

secondary

#204F4F

accent

#E3E345

background

#F4F4F4

surface

#E7E6E6

border

#C3C2C2

text

#010000

muted

#777777

Preview Lab

Preview with #100404

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

Preview Lab → · Contrast checker → · Palette generator →