#100003#100003

#100003 is a very dark, muted red. Relative luminance 0.001; OKLCH L 11.1% C 0.045 H 6.1°. Best body text is #FFFFFF at 20.52:1 contrast (WCAG AA passes).

Color values

HEX	#100003
RGB	rgb(16, 0, 3)
HSL	hsl(349, 100%, 3%)
HSV	hsv(349, 100%, 6%)
CMYK	cmyk(0%, 100%, 81.3%, 93.7%)
CIE-LAB	lab(1.05, 4.88, 0.44)
CIE-LCH	lch(1.05, 4.90, 5.12°)
OKLab	oklab(11.11% 0.0443 0.0047)
OKLCH	oklch(11.11% 0.045 6.1)
XYZ	xyz(0.2301, 0.1168, 0.0966)
Luminance	0.0012 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100003 #00100D

analogous

#10000B #100003 #100500

triadic

#100003 #031000 #000310

tetradic

#100003 #0B1000 #00100D #050010

square

#100003 #0B1000 #00100D #050010

split-complementary

#100003 #001005 #000B10

monochromatic

#1F0006 #1F0006 #1F0006 #4D000E #8A001A

Accessibility & contrast

On white

20.52

#100003 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.02

#100003 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100003

20.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100003	#FFFFFF	#000000	##FFFFFF
##100003	1.00	20.52	1.02	20.52
#FFFFFF	20.52	1.00	21.00	1.00
#000000	1.02	21.00	1.00	21.00
##FFFFFF	20.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#020203

Deuteranopia (green-blind)

#060503

Tritanopia (blue-blind)

#130001

Achromatopsia (no color)

#040404

Design tokens & code

CSS

--color: #100003;
/* rgb */ color: rgb(16, 0, 3);
/* oklch */ color: oklch(11.1% 0.045 6.1);

Tailwind

colors: {
  custom: {
    50: '#4e4748',
    500: '#100003',
    950: '#000000',
  },
}

SCSS

$custom: #100003;
$custom-light: #4e4748;
$custom-dark: #000000;

JSON

{
  "hex": "#100003",
  "rgb": {
    "r": 16,
    "g": 0,
    "b": 3
  },
  "hsl": {
    "h": 348.75,
    "s": 100,
    "l": 3.137
  },
  "oklch": {
    "l": 0.11112,
    "c": 0.04458,
    "h": 6.1
  },
  "luminance": 0.00117
}

Semantic roles & 50–950 ramp

primary

#100003

secondary

#105C4D

accent

#FFD729

background

#F4F3F4

surface

#E7E5E6

border

#C3C1C2

text

#010000

muted

#777777

Preview Lab

Preview with #100003

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

Preview Lab → · Contrast checker → · Palette generator →