#3F040D#3F040D

#3F040D is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.8% C 0.088 H 19.0°. Best body text is #FFFFFF at 17.01:1 contrast (WCAG AA passes).

Color values

HEX	#3F040D
RGB	rgb(63, 4, 13)
HSL	hsl(351, 88%, 13%)
HSV	hsv(351, 94%, 25%)
CMYK	cmyk(0%, 93.7%, 79.4%, 75.3%)
CIE-LAB	lab(10.36, 28.15, 10.80)
CIE-LCH	lch(10.36, 30.16, 21.00°)
OKLab	oklab(23.82% 0.0832 0.0287)
OKLCH	oklch(23.82% 0.088 19)
XYZ	xyz(2.1662, 1.1730, 0.4930)
Luminance	0.0117 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F040D #043F36

analogous

#3F042A #3F040D #3F1804

triadic

#3F040D #0D3F04 #040D3F

tetradic

#3F040D #2A3F04 #043F36 #18043F

square

#3F040D #2A3F04 #043F36 #18043F

split-complementary

#3F040D #043F18 #042A3F

monochromatic

#1D0206 #1D0206 #3F040D #790819 #B20B25

Accessibility & contrast

On white

17.01

#3F040D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#3F040D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F040D

17.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F040D	#FFFFFF	#000000	##FFFFFF
##3F040D	1.00	17.01	1.23	17.01
#FFFFFF	17.01	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140D

Deuteranopia (green-blind)

#25210B

Tritanopia (blue-blind)

#460008

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #3f040d;
/* rgb */ color: rgb(63, 4, 13);
/* oklch */ color: oklch(23.8% 0.088 19.0);

Tailwind

colors: {
  custom: {
    50: '#794b4c',
    500: '#3f040d',
    950: '#000000',
  },
}

SCSS

$custom: #3f040d;
$custom-light: #794b4c;
$custom-dark: #000000;

JSON

{
  "hex": "#3f040d",
  "rgb": {
    "r": 63,
    "g": 4,
    "b": 13
  },
  "hsl": {
    "h": 350.847,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23823,
    "c": 0.08804,
    "h": 19
  },
  "luminance": 0.01173
}

Semantic roles & 50–950 ramp

primary

#3F040D

secondary

#1E8071

accent

#FEDE2A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #3F040D

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

Preview Lab → · Contrast checker → · Palette generator →