#3F100B#3F100B

#3F100B is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.3% C 0.074 H 29.3°. Best body text is #FFFFFF at 16.27:1 contrast (WCAG AA passes).

Color values

HEX	#3F100B
RGB	rgb(63, 16, 11)
HSL	hsl(6, 70%, 15%)
HSV	hsv(6, 83%, 25%)
CMYK	cmyk(0%, 74.6%, 82.5%, 75.3%)
CIE-LAB	lab(12.30, 22.56, 14.40)
CIE-LCH	lch(12.30, 26.76, 32.55°)
OKLab	oklab(25.26% 0.0649 0.0365)
OKLCH	oklch(25.26% 0.074 29.3)
XYZ	xyz(2.2958, 1.4518, 0.4759)
Luminance	0.0145 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F100B #0B3A3F

analogous

#3F0B20 #3F100B #3F2A0B

triadic

#3F100B #0B3F10 #100B3F

tetradic

#3F100B #203F0B #0B3A3F #2A0B3F

square

#3F100B #203F0B #0B3A3F #2A0B3F

split-complementary

#3F100B #0B3F2A #0B203F

monochromatic

#1A0705 #1A0705 #3F100B #731D14 #A72A1D

Accessibility & contrast

On white

16.27

#3F100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#3F100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F100B

16.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F100B	#FFFFFF	#000000	##FFFFFF
##3F100B	1.00	16.27	1.29	16.27
#FFFFFF	16.27	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D1A0A

Deuteranopia (green-blind)

#292409

Tritanopia (blue-blind)

#46050F

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #3f100b;
/* rgb */ color: rgb(63, 16, 11);
/* oklch */ color: oklch(25.3% 0.074 29.3);

Tailwind

colors: {
  custom: {
    50: '#79514b',
    500: '#3f100b',
    950: '#000000',
  },
}

SCSS

$custom: #3f100b;
$custom-light: #79514b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f100b",
  "rgb": {
    "r": 63,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 5.769,
    "s": 70.27,
    "l": 14.51
  },
  "oklch": {
    "l": 0.25258,
    "c": 0.07449,
    "h": 29.3
  },
  "luminance": 0.01452
}

Semantic roles & 50–950 ramp

primary

#3F100B

secondary

#2A747C

accent

#DCED3B

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F100B

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

Preview Lab → · Contrast checker → · Palette generator →