#3F101A#3F101A

#3F101A is a dark, moderate red. Relative luminance 0.015; OKLCH L 25.6% C 0.073 H 11.2°. Best body text is #FFFFFF at 16.15:1 contrast (WCAG AA passes).

Color values

HEX	#3F101A
RGB	rgb(63, 16, 26)
HSL	hsl(347, 59%, 15%)
HSV	hsv(347, 75%, 25%)
CMYK	cmyk(0%, 74.6%, 58.7%, 75.3%)
CIE-LAB	lab(12.62, 23.76, 5.60)
CIE-LCH	lch(12.62, 24.41, 13.27°)
OKLab	oklab(25.61% 0.072 0.0143)
OKLCH	oklch(25.61% 0.073 11.2)
XYZ	xyz(2.4218, 1.5022, 1.1395)
Luminance	0.0150 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F101A #103F35

analogous

#3F1031 #3F101A #3F1D10

triadic

#3F101A #1A3F10 #101A3F

tetradic

#3F101A #313F10 #103F35 #1D103F

square

#3F101A #313F10 #103F35 #1D103F

split-complementary

#3F101A #103F1D #10313F

monochromatic

#18060A #18060A #3F101A #701C2E #A12942

Accessibility & contrast

On white

16.15

#3F101A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#3F101A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F101A

16.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F101A	#FFFFFF	#000000	##FFFFFF
##3F101A	1.00	16.15	1.30	16.15
#FFFFFF	16.15	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B1B1A

Deuteranopia (green-blind)

#272419

Tritanopia (blue-blind)

#450814

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #3f101a;
/* rgb */ color: rgb(63, 16, 26);
/* oklch */ color: oklch(25.6% 0.073 11.2);

Tailwind

colors: {
  custom: {
    50: '#775156',
    500: '#3f101a',
    950: '#000000',
  },
}

SCSS

$custom: #3f101a;
$custom-light: #775156;
$custom-dark: #000000;

JSON

{
  "hex": "#3f101a",
  "rgb": {
    "r": 63,
    "g": 16,
    "b": 26
  },
  "hsl": {
    "h": 347.234,
    "s": 59.494,
    "l": 15.49
  },
  "oklch": {
    "l": 0.25605,
    "c": 0.07335,
    "h": 11.2
  },
  "luminance": 0.01502
}

Semantic roles & 50–950 ramp

primary

#3F101A

secondary

#32796A

accent

#E3C145

background

#F7F4F5

surface

#EEE7E8

border

#C9C3C4

text

#090203

muted

#7B7878

Preview Lab

Preview with #3F101A

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

Preview Lab → · Contrast checker → · Palette generator →