#3F130B#3F130B

#3F130B is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.7% C 0.071 H 32.4°. Best body text is #FFFFFF at 16.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F130B
RGB	rgb(63, 19, 11)
HSL	hsl(9, 70%, 15%)
HSV	hsv(9, 83%, 25%)
CMYK	cmyk(0%, 69.8%, 82.5%, 75.3%)
CIE-LAB	lab(12.90, 20.94, 15.21)
CIE-LCH	lch(12.90, 25.88, 36.00°)
OKLab	oklab(25.71% 0.0599 0.038)
OKLCH	oklch(25.71% 0.071 32.4)
XYZ	xyz(2.3434, 1.5470, 0.4917)
Luminance	0.0155 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F130B #0B373F

analogous

#3F0B1D #3F130B #3F2D0B

triadic

#3F130B #0B3F13 #130B3F

tetradic

#3F130B #1D3F0B #0B373F #2D0B3F

square

#3F130B #1D3F0B #0B373F #2D0B3F

split-complementary

#3F130B #0B3F2D #0B1D3F

monochromatic

#1A0805 #1A0805 #3F130B #732314 #A7321D

Accessibility & contrast

On white

16.04

#3F130B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#3F130B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F130B

16.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F130B	#FFFFFF	#000000	##FFFFFF
##3F130B	1.00	16.04	1.31	16.04
#FFFFFF	16.04	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F1B0A

Deuteranopia (green-blind)

#2A250A

Tritanopia (blue-blind)

#460911

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #3f130b;
/* rgb */ color: rgb(63, 19, 11);
/* oklch */ color: oklch(25.7% 0.071 32.4);

Tailwind

colors: {
  custom: {
    50: '#78534b',
    500: '#3f130b',
    950: '#000000',
  },
}

SCSS

$custom: #3f130b;
$custom-light: #78534b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f130b",
  "rgb": {
    "r": 63,
    "g": 19,
    "b": 11
  },
  "hsl": {
    "h": 9.231,
    "s": 70.27,
    "l": 14.51
  },
  "oklch": {
    "l": 0.25714,
    "c": 0.07092,
    "h": 32.4
  },
  "luminance": 0.01547
}

Semantic roles & 50–950 ramp

primary

#3F130B

secondary

#2A6F7C

accent

#D2ED3B

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F130B

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

Preview Lab → · Contrast checker → · Palette generator →