#3F040C#3F040C

#3F040C is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.8% C 0.088 H 20.0°. Best body text is #FFFFFF at 17.02:1 contrast (WCAG AA passes).

Color values

HEX	#3F040C
RGB	rgb(63, 4, 12)
HSL	hsl(352, 88%, 13%)
HSV	hsv(352, 94%, 25%)
CMYK	cmyk(0%, 93.7%, 81%, 75.3%)
CIE-LAB	lab(10.34, 28.10, 11.24)
CIE-LCH	lch(10.34, 30.26, 21.81°)
OKLab	oklab(23.8% 0.0828 0.0301)
OKLCH	oklch(23.8% 0.088 20)
XYZ	xyz(2.1599, 1.1705, 0.4600)
Luminance	0.0117 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F040C #043F37

analogous

#3F0429 #3F040C #3F1904

triadic

#3F040C #0C3F04 #040C3F

tetradic

#3F040C #293F04 #043F37 #19043F

square

#3F040C #293F04 #043F37 #19043F

split-complementary

#3F040C #043F19 #04293F

monochromatic

#1D0205 #1D0205 #3F040C #790817 #B20B22

Accessibility & contrast

On white

17.02

#3F040C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#3F040C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F040C

17.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F040C	#FFFFFF	#000000	##FFFFFF
##3F040C	1.00	17.02	1.23	17.02
#FFFFFF	17.02	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140C

Deuteranopia (green-blind)

#25210A

Tritanopia (blue-blind)

#460007

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #3f040c;
/* rgb */ color: rgb(63, 4, 12);
/* oklch */ color: oklch(23.8% 0.088 20.0);

Tailwind

colors: {
  custom: {
    50: '#794b4c',
    500: '#3f040c',
    950: '#000000',
  },
}

SCSS

$custom: #3f040c;
$custom-light: #794b4c;
$custom-dark: #000000;

JSON

{
  "hex": "#3f040c",
  "rgb": {
    "r": 63,
    "g": 4,
    "b": 12
  },
  "hsl": {
    "h": 351.864,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23803,
    "c": 0.08807,
    "h": 20
  },
  "luminance": 0.0117
}

Semantic roles & 50–950 ramp

primary

#3F040C

secondary

#1E8073

accent

#FEE12A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #3F040C

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

Preview Lab → · Contrast checker → · Palette generator →