#3B100A#3B100A

#3B100A is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.4% C 0.069 H 30.6°. Best body text is #FFFFFF at 16.61:1 contrast (WCAG AA passes).

Color values

HEX	#3B100A
RGB	rgb(59, 16, 10)
HSL	hsl(7, 71%, 14%)
HSV	hsv(7, 83%, 23%)
CMYK	cmyk(0%, 72.9%, 83.1%, 76.9%)
CIE-LAB	lab(11.43, 20.80, 13.49)
CIE-LCH	lch(11.43, 24.79, 32.97°)
OKLab	oklab(24.44% 0.0597 0.0354)
OKLCH	oklch(24.44% 0.069 30.6)
XYZ	xyz(2.0439, 1.3226, 0.4348)
Luminance	0.0132 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B100A #0A353B

analogous

#3B0A1C #3B100A #3B280A

triadic

#3B100A #0A3B10 #100A3B

tetradic

#3B100A #1C3B0A #0A353B #280A3B

square

#3B100A #1C3B0A #0A353B #280A3B

split-complementary

#3B100A #0A3B28 #0A1C3B

monochromatic

#1A0704 #1A0704 #3B100A #6F1E13 #A42C1C

Accessibility & contrast

On white

16.61

#3B100A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#3B100A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B100A

16.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B100A	#FFFFFF	#000000	##FFFFFF
##3B100A	1.00	16.61	1.26	16.61
#FFFFFF	16.61	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C1809

Deuteranopia (green-blind)

#262209

Tritanopia (blue-blind)

#42060F

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3b100a;
/* rgb */ color: rgb(59, 16, 10);
/* oklch */ color: oklch(24.4% 0.069 30.6);

Tailwind

colors: {
  custom: {
    50: '#75504b',
    500: '#3b100a',
    950: '#000000',
  },
}

SCSS

$custom: #3b100a;
$custom-light: #75504b;
$custom-dark: #000000;

JSON

{
  "hex": "#3b100a",
  "rgb": {
    "r": 59,
    "g": 16,
    "b": 10
  },
  "hsl": {
    "h": 7.347,
    "s": 71.014,
    "l": 13.529
  },
  "oklch": {
    "l": 0.24442,
    "c": 0.06943,
    "h": 30.6
  },
  "luminance": 0.01322
}

Semantic roles & 50–950 ramp

primary

#3B100A

secondary

#286F78

accent

#D8EE3A

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#090201

muted

#7B7877

Preview Lab

Preview with #3B100A

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

Preview Lab → · Contrast checker → · Palette generator →