#100403#100403

#100403 is a very dark, muted red. Relative luminance 0.002; OKLCH L 13.0% C 0.026 H 29.2°. Best body text is #FFFFFF at 20.18:1 contrast (WCAG AA passes).

Color values

HEX	#100403
RGB	rgb(16, 4, 3)
HSL	hsl(5, 68%, 4%)
HSV	hsv(5, 81%, 6%)
CMYK	cmyk(0%, 75%, 81.3%, 93.7%)
CIE-LAB	lab(1.84, 3.28, 1.58)
CIE-LCH	lch(1.84, 3.64, 25.76°)
OKLab	oklab(12.97% 0.0229 0.0128)
OKLCH	oklch(12.97% 0.026 29.2)
XYZ	xyz(0.2736, 0.2036, 0.1110)
Luminance	0.0020 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100403 #030F10

analogous

#100308 #100403 #100A03

triadic

#100403 #031004 #040310

tetradic

#100403 #081003 #030F10 #0A0310

square

#100403 #081003 #030F10 #0A0310

split-complementary

#100403 #03100A #030810

monochromatic

#1A0605 #1A0605 #1A0605 #44110D #771E16

Accessibility & contrast

On white

20.18

#100403 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.04

#100403 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100403

20.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100403	#FFFFFF	#000000	##FFFFFF
##100403	1.00	20.18	1.04	20.18
#FFFFFF	20.18	1.00	21.00	1.00
#000000	1.04	21.00	1.00	21.00
##FFFFFF	20.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#060503

Deuteranopia (green-blind)

#090803

Tritanopia (blue-blind)

#120304

Achromatopsia (no color)

#070707

Design tokens & code

CSS

--color: #100403;
/* rgb */ color: rgb(16, 4, 3);
/* oklch */ color: oklch(13.0% 0.026 29.2);

Tailwind

colors: {
  custom: {
    50: '#4e4848',
    500: '#100403',
    950: '#000000',
  },
}

SCSS

$custom: #100403;
$custom-light: #4e4848;
$custom-dark: #000000;

JSON

{
  "hex": "#100403",
  "rgb": {
    "r": 16,
    "g": 4,
    "b": 3
  },
  "hsl": {
    "h": 4.615,
    "s": 68.421,
    "l": 3.725
  },
  "oklch": {
    "l": 0.12969,
    "c": 0.0262,
    "h": 29.2
  },
  "luminance": 0.00204
}

Semantic roles & 50–950 ramp

primary

#100403

secondary

#1D4E52

accent

#DEEB3D

background

#F4F4F4

surface

#E7E6E6

border

#C3C2C2

text

#010000

muted

#777777

Preview Lab

Preview with #100403

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

Preview Lab → · Contrast checker → · Palette generator →