#100503#100503

#100503 is a very dark, muted red. Relative luminance 0.002; OKLCH L 13.4% C 0.024 H 36.9°. Best body text is #FFFFFF at 20.10:1 contrast (WCAG AA passes).

Color values

HEX	#100503
RGB	rgb(16, 5, 3)
HSL	hsl(9, 68%, 4%)
HSV	hsv(9, 81%, 6%)
CMYK	cmyk(0%, 68.7%, 81.3%, 93.7%)
CIE-LAB	lab(2.04, 2.88, 1.87)
CIE-LCH	lch(2.04, 3.43, 33.01°)
OKLab	oklab(13.36% 0.019 0.0143)
OKLCH	oklch(13.36% 0.024 36.9)
XYZ	xyz(0.2844, 0.2253, 0.1146)
Luminance	0.0022 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100503 #030E10

analogous

#100307 #100503 #100B03

triadic

#100503 #031005 #050310

tetradic

#100503 #071003 #030E10 #0B0310

square

#100503 #071003 #030E10 #0B0310

split-complementary

#100503 #03100B #030710

monochromatic

#1A0805 #1A0805 #1A0805 #44150D #772516

Accessibility & contrast

On white

20.10

#100503 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.05

#100503 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100503

20.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100503	#FFFFFF	#000000	##FFFFFF
##100503	1.00	20.10	1.05	20.10
#FFFFFF	20.10	1.00	21.00	1.00
#000000	1.05	21.00	1.00	21.00
##FFFFFF	20.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#070603

Deuteranopia (green-blind)

#0A0803

Tritanopia (blue-blind)

#120404

Achromatopsia (no color)

#070707

Design tokens & code

CSS

--color: #100503;
/* rgb */ color: rgb(16, 5, 3);
/* oklch */ color: oklch(13.4% 0.024 36.9);

Tailwind

colors: {
  custom: {
    50: '#4e4948',
    500: '#100503',
    950: '#000000',
  },
}

SCSS

$custom: #100503;
$custom-light: #4e4948;
$custom-dark: #000000;

JSON

{
  "hex": "#100503",
  "rgb": {
    "r": 16,
    "g": 5,
    "b": 3
  },
  "hsl": {
    "h": 9.231,
    "s": 68.421,
    "l": 3.725
  },
  "oklch": {
    "l": 0.13355,
    "c": 0.02379,
    "h": 36.9
  },
  "luminance": 0.00225
}

Semantic roles & 50–950 ramp

primary

#100503

secondary

#1D4A52

accent

#D0EB3D

background

#F4F4F4

surface

#E7E6E6

border

#C3C2C2

text

#010000

muted

#777777

Preview Lab

Preview with #100503

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

Preview Lab → · Contrast checker → · Palette generator →