#3F090B#3F090B

#3F090B is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.4% C 0.082 H 24.0°. Best body text is #FFFFFF at 16.73:1 contrast (WCAG AA passes).

Color values

HEX	#3F090B
RGB	rgb(63, 9, 11)
HSL	hsl(358, 75%, 14%)
HSV	hsv(358, 86%, 25%)
CMYK	cmyk(0%, 85.7%, 82.5%, 75.3%)
CIE-LAB	lab(11.11, 25.81, 12.77)
CIE-LCH	lch(11.11, 28.80, 26.32°)
OKLab	oklab(24.37% 0.0752 0.0335)
OKLCH	oklch(24.37% 0.082 24)
XYZ	xyz(2.2082, 1.2766, 0.4467)
Luminance	0.0128 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F090B #093F3D

analogous

#3F0926 #3F090B #3F2209

triadic

#3F090B #0B3F09 #090B3F

tetradic

#3F090B #263F09 #093F3D #22093F

square

#3F090B #263F09 #093F3D #22093F

split-complementary

#3F090B #093F22 #09263F

monochromatic

#1B0405 #1B0405 #3F090B #751114 #AA181E

Accessibility & contrast

On white

16.73

#3F090B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#3F090B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F090B

16.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F090B	#FFFFFF	#000000	##FFFFFF
##3F090B	1.00	16.73	1.26	16.73
#FFFFFF	16.73	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19160B

Deuteranopia (green-blind)

#272209

Tritanopia (blue-blind)

#46000A

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3f090b;
/* rgb */ color: rgb(63, 9, 11);
/* oklch */ color: oklch(24.4% 0.082 24.0);

Tailwind

colors: {
  custom: {
    50: '#794e4b',
    500: '#3f090b',
    950: '#000000',
  },
}

SCSS

$custom: #3f090b;
$custom-light: #794e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f090b",
  "rgb": {
    "r": 63,
    "g": 9,
    "b": 11
  },
  "hsl": {
    "h": 357.778,
    "s": 75,
    "l": 14.118
  },
  "oklch": {
    "l": 0.24371,
    "c": 0.08233,
    "h": 24
  },
  "luminance": 0.01276
}

Semantic roles & 50–950 ramp

primary

#3F090B

secondary

#277D7A

accent

#F2EB36

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F090B

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

Preview Lab → · Contrast checker → · Palette generator →