#3F131B#3F131B

#3F131B is a dark, moderate red. Relative luminance 0.016; OKLCH L 26.1% C 0.069 H 12.2°. Best body text is #FFFFFF at 15.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F131B
RGB	rgb(63, 19, 27)
HSL	hsl(349, 54%, 16%)
HSV	hsv(349, 70%, 25%)
CMYK	cmyk(0%, 69.8%, 57.1%, 75.3%)
CIE-LAB	lab(13.24, 22.27, 5.72)
CIE-LCH	lch(13.24, 23.00, 14.40°)
OKLab	oklab(26.08% 0.0674 0.0146)
OKLCH	oklch(26.08% 0.069 12.2)
XYZ	xyz(2.4808, 1.6019, 1.2153)
Luminance	0.0160 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F131B #133F37

analogous

#3F1331 #3F131B #3F2113

triadic

#3F131B #1B3F13 #131B3F

tetradic

#3F131B #313F13 #133F37 #21133F

square

#3F131B #313F13 #133F37 #21133F

split-complementary

#3F131B #133F21 #13313F

monochromatic

#18070A #18070A #3F131B #6E212F #9D2F43

Accessibility & contrast

On white

15.90

#3F131B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#3F131B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F131B

15.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F131B	#FFFFFF	#000000	##FFFFFF
##3F131B	1.00	15.90	1.32	15.90
#FFFFFF	15.90	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D1C1B

Deuteranopia (green-blind)

#28251A

Tritanopia (blue-blind)

#450C16

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #3f131b;
/* rgb */ color: rgb(63, 19, 27);
/* oklch */ color: oklch(26.1% 0.069 12.2);

Tailwind

colors: {
  custom: {
    50: '#775357',
    500: '#3f131b',
    950: '#000000',
  },
}

SCSS

$custom: #3f131b;
$custom-light: #775357;
$custom-dark: #000000;

JSON

{
  "hex": "#3f131b",
  "rgb": {
    "r": 63,
    "g": 19,
    "b": 27
  },
  "hsl": {
    "h": 349.091,
    "s": 53.659,
    "l": 16.078
  },
  "oklch": {
    "l": 0.26077,
    "c": 0.06893,
    "h": 12.2
  },
  "luminance": 0.01602
}

Semantic roles & 50–950 ramp

primary

#3F131B

secondary

#36786C

accent

#DDC24B

background

#F7F4F5

surface

#EDE7E9

border

#C8C3C5

text

#090203

muted

#7B7878

Preview Lab

Preview with #3F131B

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

Preview Lab → · Contrast checker → · Palette generator →