#3F0A0A#3F0A0A

#3F0A0A is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.5% C 0.081 H 25.6°. Best body text is #FFFFFF at 16.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F0A0A
RGB	rgb(63, 10, 10)
HSL	hsl(0, 73%, 14%)
HSV	hsv(0, 84%, 25%)
CMYK	cmyk(0%, 84.1%, 84.1%, 75.3%)
CIE-LAB	lab(11.25, 25.34, 13.38)
CIE-LCH	lch(11.25, 28.65, 27.83°)
OKLab	oklab(24.47% 0.0734 0.0352)
OKLCH	oklch(24.47% 0.081 25.6)
XYZ	xyz(2.2135, 1.2961, 0.4207)
Luminance	0.0130 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F0A0A #0A3F3F

analogous

#3F0A25 #3F0A0A #3F250A

triadic

#3F0A0A #0A3F0A #0A0A3F

tetradic

#3F0A0A #253F0A #0A3F3F #250A3F

square

#3F0A0A #253F0A #0A3F3F #250A3F

split-complementary

#3F0A0A #0A3F25 #0A253F

monochromatic

#1A0404 #1A0404 #3F0A0A #741212 #A91B1B

Accessibility & contrast

On white

16.68

#3F0A0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#3F0A0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F0A0A

16.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F0A0A	#FFFFFF	#000000	##FFFFFF
##3F0A0A	1.00	16.68	1.26	16.68
#FFFFFF	16.68	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A1709

Deuteranopia (green-blind)

#272208

Tritanopia (blue-blind)

#46000B

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3f0a0a;
/* rgb */ color: rgb(63, 10, 10);
/* oklch */ color: oklch(24.5% 0.081 25.6);

Tailwind

colors: {
  custom: {
    50: '#794e4b',
    500: '#3f0a0a',
    950: '#000000',
  },
}

SCSS

$custom: #3f0a0a;
$custom-light: #794e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f0a0a",
  "rgb": {
    "r": 63,
    "g": 10,
    "b": 10
  },
  "hsl": {
    "h": 0,
    "s": 72.603,
    "l": 14.314
  },
  "oklch": {
    "l": 0.24468,
    "c": 0.0814,
    "h": 25.6
  },
  "luminance": 0.01296
}

Semantic roles & 50–950 ramp

primary

#3F0A0A

secondary

#297C7C

accent

#EFEF38

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F0A0A

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

Preview Lab → · Contrast checker → · Palette generator →