#3F0B0B#3F0B0B

#3F0B0B is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.6% C 0.080 H 25.3°. Best body text is #FFFFFF at 16.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F0B0B
RGB	rgb(63, 11, 11)
HSL	hsl(0, 70%, 15%)
HSV	hsv(0, 83%, 25%)
CMYK	cmyk(0%, 82.5%, 82.5%, 75.3%)
CIE-LAB	lab(11.42, 24.96, 13.19)
CIE-LCH	lch(11.42, 28.23, 27.86°)
OKLab	oklab(24.6% 0.0725 0.0343)
OKLCH	oklch(24.6% 0.08 25.3)
XYZ	xyz(2.2302, 1.3206, 0.4540)
Luminance	0.0132 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F0B0B #0B3F3F

analogous

#3F0B25 #3F0B0B #3F250B

triadic

#3F0B0B #0B3F0B #0B0B3F

tetradic

#3F0B0B #253F0B #0B3F3F #250B3F

square

#3F0B0B #253F0B #0B3F3F #250B3F

split-complementary

#3F0B0B #0B3F25 #0B253F

monochromatic

#1A0505 #1A0505 #3F0B0B #731414 #A71D1D

Accessibility & contrast

On white

16.61

#3F0B0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#3F0B0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F0B0B

16.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F0B0B	#FFFFFF	#000000	##FFFFFF
##3F0B0B	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)

#1A170A

Deuteranopia (green-blind)

#272209

Tritanopia (blue-blind)

#46000C

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3f0b0b;
/* rgb */ color: rgb(63, 11, 11);
/* oklch */ color: oklch(24.6% 0.080 25.3);

Tailwind

colors: {
  custom: {
    50: '#794e4b',
    500: '#3f0b0b',
    950: '#000000',
  },
}

SCSS

$custom: #3f0b0b;
$custom-light: #794e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f0b0b",
  "rgb": {
    "r": 63,
    "g": 11,
    "b": 11
  },
  "hsl": {
    "h": 0,
    "s": 70.27,
    "l": 14.51
  },
  "oklch": {
    "l": 0.246,
    "c": 0.08019,
    "h": 25.3
  },
  "luminance": 0.0132
}

Semantic roles & 50–950 ramp

primary

#3F0B0B

secondary

#2A7C7C

accent

#EDED3B

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F0B0B

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

Preview Lab → · Contrast checker → · Palette generator →