#3F181F#3F181F

#3F181F is a dark, moderate red. Relative luminance 0.018; OKLCH L 27.0% C 0.061 H 10.9°. Best body text is #FFFFFF at 15.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F181F
RGB	rgb(63, 24, 31)
HSL	hsl(349, 45%, 17%)
HSV	hsv(349, 62%, 25%)
CMYK	cmyk(0%, 61.9%, 50.8%, 75.3%)
CIE-LAB	lab(14.45, 19.86, 4.48)
CIE-LCH	lch(14.45, 20.36, 12.72°)
OKLab	oklab(27.02% 0.0602 0.0116)
OKLCH	oklch(27.02% 0.061 10.9)
XYZ	xyz(2.6240, 1.8092, 1.5071)
Luminance	0.0181 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F181F #183F38

analogous

#3F1833 #3F181F #3F2518

triadic

#3F181F #1F3F18 #181F3F

tetradic

#3F181F #333F18 #183F38 #25183F

square

#3F181F #333F18 #183F38 #25183F

split-complementary

#3F181F #183F25 #18333F

monochromatic

#16080B #16080B #3F181F #6B2935 #983A4B

Accessibility & contrast

On white

15.42

#3F181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#3F181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F181F

15.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F181F	#FFFFFF	#000000	##FFFFFF
##3F181F	1.00	15.42	1.36	15.42
#FFFFFF	15.42	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20201F

Deuteranopia (green-blind)

#2A271E

Tritanopia (blue-blind)

#45131B

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #3f181f;
/* rgb */ color: rgb(63, 24, 31);
/* oklch */ color: oklch(27.0% 0.061 10.9);

Tailwind

colors: {
  custom: {
    50: '#76565a',
    500: '#3f181f',
    950: '#000000',
  },
}

SCSS

$custom: #3f181f;
$custom-light: #76565a;
$custom-dark: #000000;

JSON

{
  "hex": "#3f181f",
  "rgb": {
    "r": 63,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 349.231,
    "s": 44.828,
    "l": 17.059
  },
  "oklch": {
    "l": 0.27024,
    "c": 0.06129,
    "h": 10.9
  },
  "luminance": 0.01809
}

Semantic roles & 50–950 ramp

primary

#3F181F

secondary

#3D756B

accent

#D5BD53

background

#F7F5F5

surface

#EDE9E9

border

#C8C5C5

text

#090303

muted

#7B7878

Preview Lab

Preview with #3F181F

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

Preview Lab → · Contrast checker → · Palette generator →