#3F101B#3F101B

#3F101B is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.6% C 0.073 H 9.9°. Best body text is #FFFFFF at 16.14:1 contrast (WCAG AA passes).

Color values

HEX	#3F101B
RGB	rgb(63, 16, 27)
HSL	hsl(346, 59%, 15%)
HSV	hsv(346, 75%, 25%)
CMYK	cmyk(0%, 74.6%, 57.1%, 75.3%)
CIE-LAB	lab(12.65, 23.86, 4.90)
CIE-LCH	lch(12.65, 24.36, 11.60°)
OKLab	oklab(25.64% 0.0724 0.0126)
OKLCH	oklch(25.64% 0.074 9.9)
XYZ	xyz(2.4332, 1.5068, 1.1994)
Luminance	0.0151 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F101B #103F34

analogous

#3F1032 #3F101B #3F1C10

triadic

#3F101B #1B3F10 #101B3F

tetradic

#3F101B #323F10 #103F34 #1C103F

square

#3F101B #323F10 #103F34 #1C103F

split-complementary

#3F101B #103F1C #10323F

monochromatic

#18060A #18060A #3F101B #701C30 #A12945

Accessibility & contrast

On white

16.14

#3F101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#3F101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F101B

16.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F101B	#FFFFFF	#000000	##FFFFFF
##3F101B	1.00	16.14	1.30	16.14
#FFFFFF	16.14	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B1B1B

Deuteranopia (green-blind)

#27241A

Tritanopia (blue-blind)

#450814

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #3f101b;
/* rgb */ color: rgb(63, 16, 27);
/* oklch */ color: oklch(25.6% 0.073 9.9);

Tailwind

colors: {
  custom: {
    50: '#775157',
    500: '#3f101b',
    950: '#000000',
  },
}

SCSS

$custom: #3f101b;
$custom-light: #775157;
$custom-dark: #000000;

JSON

{
  "hex": "#3f101b",
  "rgb": {
    "r": 63,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 345.957,
    "s": 59.494,
    "l": 15.49
  },
  "oklch": {
    "l": 0.25636,
    "c": 0.0735,
    "h": 9.9
  },
  "luminance": 0.01506
}

Semantic roles & 50–950 ramp

primary

#3F101B

secondary

#327968

accent

#E3BE45

background

#F7F4F5

surface

#EDE7E9

border

#C8C3C5

text

#090203

muted

#7B7878

Preview Lab

Preview with #3F101B

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

Preview Lab → · Contrast checker → · Palette generator →