#3F0404#3F0404

#3F0404 is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.7% C 0.089 H 27.5°. Best body text is #FFFFFF at 17.07:1 contrast (WCAG AA passes).

Color values

HEX	#3F0404
RGB	rgb(63, 4, 4)
HSL	hsl(0, 88%, 13%)
HSV	hsv(0, 94%, 25%)
CMYK	cmyk(0%, 93.7%, 93.7%, 75.3%)
CIE-LAB	lab(10.20, 27.70, 14.36)
CIE-LCH	lch(10.20, 31.20, 27.40°)
OKLab	oklab(23.66% 0.079 0.0411)
OKLCH	oklch(23.66% 0.089 27.5)
XYZ	xyz(2.1155, 1.1527, 0.2260)
Luminance	0.0115 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F0404 #043F3F

analogous

#3F0421 #3F0404 #3F2104

triadic

#3F0404 #043F04 #04043F

tetradic

#3F0404 #213F04 #043F3F #21043F

square

#3F0404 #213F04 #043F3F #21043F

split-complementary

#3F0404 #043F21 #04213F

monochromatic

#1D0202 #1D0202 #3F0404 #790808 #B20B0B

Accessibility & contrast

On white

17.07

#3F0404 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#3F0404 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F0404

17.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F0404	#FFFFFF	#000000	##FFFFFF
##3F0404	1.00	17.07	1.23	17.07
#FFFFFF	17.07	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#171403

Deuteranopia (green-blind)

#262002

Tritanopia (blue-blind)

#460005

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #3f0404;
/* rgb */ color: rgb(63, 4, 4);
/* oklch */ color: oklch(23.7% 0.089 27.5);

Tailwind

colors: {
  custom: {
    50: '#7a4b48',
    500: '#3f0404',
    950: '#000000',
  },
}

SCSS

$custom: #3f0404;
$custom-light: #7a4b48;
$custom-dark: #000000;

JSON

{
  "hex": "#3f0404",
  "rgb": {
    "r": 63,
    "g": 4,
    "b": 4
  },
  "hsl": {
    "h": 0,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23661,
    "c": 0.08903,
    "h": 27.5
  },
  "luminance": 0.01152
}

Semantic roles & 50–950 ramp

primary

#3F0404

secondary

#1E8080

accent

#FEFE2A

background

#F7F4F4

surface

#EEE7E6

border

#C9C3C2

text

#0A0100

muted

#7C7777

Preview Lab

Preview with #3F0404

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

Preview Lab → · Contrast checker → · Palette generator →