#3B100B#3B100B

#3B100B is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.5% C 0.069 H 29.6°. Best body text is #FFFFFF at 16.60:1 contrast (WCAG AA passes).

Color values

HEX	#3B100B
RGB	rgb(59, 16, 11)
HSL	hsl(6, 69%, 14%)
HSV	hsv(6, 81%, 23%)
CMYK	cmyk(0%, 72.9%, 81.4%, 76.9%)
CIE-LAB	lab(11.45, 20.86, 13.10)
CIE-LCH	lch(11.45, 24.63, 32.12°)
OKLab	oklab(24.46% 0.0602 0.0341)
OKLCH	oklch(24.46% 0.069 29.6)
XYZ	xyz(2.0495, 1.3248, 0.4643)
Luminance	0.0132 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B100B #0B363B

analogous

#3B0B1E #3B100B #3B280B

triadic

#3B100B #0B3B10 #100B3B

tetradic

#3B100B #1E3B0B #0B363B #280B3B

square

#3B100B #1E3B0B #0B363B #280B3B

split-complementary

#3B100B #0B3B28 #0B1E3B

monochromatic

#1A0705 #1A0705 #3B100B #6F1E15 #A22C1E

Accessibility & contrast

On white

16.60

#3B100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#3B100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B100B

16.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B100B	#FFFFFF	#000000	##FFFFFF
##3B100B	1.00	16.60	1.26	16.60
#FFFFFF	16.60	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C180A

Deuteranopia (green-blind)

#26220A

Tritanopia (blue-blind)

#42060F

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3b100b;
/* rgb */ color: rgb(59, 16, 11);
/* oklch */ color: oklch(24.5% 0.069 29.6);

Tailwind

colors: {
  custom: {
    50: '#75504b',
    500: '#3b100b',
    950: '#000000',
  },
}

SCSS

$custom: #3b100b;
$custom-light: #75504b;
$custom-dark: #000000;

JSON

{
  "hex": "#3b100b",
  "rgb": {
    "r": 59,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 6.25,
    "s": 68.571,
    "l": 13.725
  },
  "oklch": {
    "l": 0.24459,
    "c": 0.06918,
    "h": 29.6
  },
  "luminance": 0.01325
}

Semantic roles & 50–950 ramp

primary

#3B100B

secondary

#2A7078

accent

#D9EB3C

background

#F7F4F4

surface

#EDE7E7

border

#C8C3C3

text

#090201

muted

#7B7877

Preview Lab

Preview with #3B100B

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

Preview Lab → · Contrast checker → · Palette generator →