#3F040A#3F040A

#3F040A is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.8% C 0.088 H 21.8°. Best body text is #FFFFFF at 17.03:1 contrast (WCAG AA passes).

Color values

HEX	#3F040A
RGB	rgb(63, 4, 10)
HSL	hsl(354, 88%, 13%)
HSV	hsv(354, 94%, 25%)
CMYK	cmyk(0%, 93.7%, 84.1%, 75.3%)
CIE-LAB	lab(10.30, 27.99, 12.06)
CIE-LCH	lch(10.30, 30.48, 23.30°)
OKLab	oklab(23.77% 0.0819 0.0328)
OKLCH	oklch(23.77% 0.088 21.8)
XYZ	xyz(2.1484, 1.1659, 0.3990)
Luminance	0.0117 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F040A #043F39

analogous

#3F0427 #3F040A #3F1B04

triadic

#3F040A #0A3F04 #040A3F

tetradic

#3F040A #273F04 #043F39 #1B043F

square

#3F040A #273F04 #043F39 #1B043F

split-complementary

#3F040A #043F1B #04273F

monochromatic

#1D0205 #1D0205 #3F040A #790813 #B20B1C

Accessibility & contrast

On white

17.03

#3F040A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#3F040A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F040A

17.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F040A	#FFFFFF	#000000	##FFFFFF
##3F040A	1.00	17.03	1.23	17.03
#FFFFFF	17.03	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140A

Deuteranopia (green-blind)

#252108

Tritanopia (blue-blind)

#460007

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #3f040a;
/* rgb */ color: rgb(63, 4, 10);
/* oklch */ color: oklch(23.8% 0.088 21.8);

Tailwind

colors: {
  custom: {
    50: '#794b4b',
    500: '#3f040a',
    950: '#000000',
  },
}

SCSS

$custom: #3f040a;
$custom-light: #794b4b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f040a",
  "rgb": {
    "r": 63,
    "g": 4,
    "b": 10
  },
  "hsl": {
    "h": 353.898,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23766,
    "c": 0.0882,
    "h": 21.8
  },
  "luminance": 0.01166
}

Semantic roles & 50–950 ramp

primary

#3F040A

secondary

#1E8076

accent

#FEE92A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #3F040A

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

Preview Lab → · Contrast checker → · Palette generator →