#3F170B#3F170B

#3F170B is a dark, moderate red. Relative luminance 0.017; OKLCH L 26.4% C 0.066 H 37.3°. Best body text is #FFFFFF at 15.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F170B
RGB	rgb(63, 23, 11)
HSL	hsl(14, 70%, 15%)
HSV	hsv(14, 83%, 25%)
CMYK	cmyk(0%, 63.5%, 82.5%, 75.3%)
CIE-LAB	lab(13.79, 18.62, 16.39)
CIE-LCH	lch(13.79, 24.81, 41.36°)
OKLab	oklab(26.39% 0.0527 0.0401)
OKLCH	oklch(26.39% 0.066 37.3)
XYZ	xyz(2.4169, 1.6940, 0.5163)
Luminance	0.0169 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F170B #0B333F

analogous

#3F0B19 #3F170B #3F310B

triadic

#3F170B #0B3F17 #170B3F

tetradic

#3F170B #193F0B #0B333F #310B3F

square

#3F170B #193F0B #0B333F #310B3F

split-complementary

#3F170B #0B3F31 #0B193F

monochromatic

#1A0A05 #1A0A05 #3F170B #732A14 #A73D1D

Accessibility & contrast

On white

15.69

#3F170B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#3F170B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F170B

15.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F170B	#FFFFFF	#000000	##FFFFFF
##3F170B	1.00	15.69	1.34	15.69
#FFFFFF	15.69	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#221E0A

Deuteranopia (green-blind)

#2C270A

Tritanopia (blue-blind)

#460E14

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #3f170b;
/* rgb */ color: rgb(63, 23, 11);
/* oklch */ color: oklch(26.4% 0.066 37.3);

Tailwind

colors: {
  custom: {
    50: '#78554b',
    500: '#3f170b',
    950: '#000000',
  },
}

SCSS

$custom: #3f170b;
$custom-light: #78554b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f170b",
  "rgb": {
    "r": 63,
    "g": 23,
    "b": 11
  },
  "hsl": {
    "h": 13.846,
    "s": 70.27,
    "l": 14.51
  },
  "oklch": {
    "l": 0.26386,
    "c": 0.06623,
    "h": 37.3
  },
  "luminance": 0.01694
}

Semantic roles & 50–950 ramp

primary

#3F170B

secondary

#2A697C

accent

#C4ED3B

background

#F7F5F4

surface

#EEE9E7

border

#C9C5C3

text

#090301

muted

#7B7877

Preview Lab

Preview with #3F170B

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

Preview Lab → · Contrast checker → · Palette generator →