#3F090F#3F090F

#3F090F is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.4% C 0.082 H 20.0°. Best body text is #FFFFFF at 16.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F090F
RGB	rgb(63, 9, 15)
HSL	hsl(353, 75%, 14%)
HSV	hsv(353, 86%, 25%)
CMYK	cmyk(0%, 85.7%, 76.2%, 75.3%)
CIE-LAB	lab(11.18, 26.05, 10.95)
CIE-LCH	lch(11.18, 28.26, 22.80°)
OKLab	oklab(24.45% 0.077 0.028)
OKLCH	oklch(24.45% 0.082 20)
XYZ	xyz(2.2341, 1.2870, 0.5826)
Luminance	0.0129 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F090F #093F39

analogous

#3F092A #3F090F #3F1E09

triadic

#3F090F #0F3F09 #090F3F

tetradic

#3F090F #2A3F09 #093F39 #1E093F

square

#3F090F #2A3F09 #093F39 #1E093F

split-complementary

#3F090F #093F1E #092A3F

monochromatic

#1B0406 #1B0406 #3F090F #75111C #AA1829

Accessibility & contrast

On white

16.70

#3F090F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#3F090F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F090F

16.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F090F	#FFFFFF	#000000	##FFFFFF
##3F090F	1.00	16.70	1.26	16.70
#FFFFFF	16.70	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19170F

Deuteranopia (green-blind)

#26220D

Tritanopia (blue-blind)

#46000C

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3f090f;
/* rgb */ color: rgb(63, 9, 15);
/* oklch */ color: oklch(24.4% 0.082 20.0);

Tailwind

colors: {
  custom: {
    50: '#794e4d',
    500: '#3f090f',
    950: '#000000',
  },
}

SCSS

$custom: #3f090f;
$custom-light: #794e4d;
$custom-dark: #000000;

JSON

{
  "hex": "#3f090f",
  "rgb": {
    "r": 63,
    "g": 9,
    "b": 15
  },
  "hsl": {
    "h": 353.333,
    "s": 75,
    "l": 14.118
  },
  "oklch": {
    "l": 0.24448,
    "c": 0.08195,
    "h": 20
  },
  "luminance": 0.01287
}

Semantic roles & 50–950 ramp

primary

#3F090F

secondary

#277D73

accent

#F2DD36

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F090F

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

Preview Lab → · Contrast checker → · Palette generator →