#3F040F#3F040F

#3F040F is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.9% C 0.088 H 17.0°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F040F
RGB	rgb(63, 4, 15)
HSL	hsl(349, 88%, 13%)
HSV	hsv(349, 94%, 25%)
CMYK	cmyk(0%, 93.7%, 76.2%, 75.3%)
CIE-LAB	lab(10.40, 28.28, 9.85)
CIE-LCH	lch(10.40, 29.94, 19.21°)
OKLab	oklab(23.87% 0.0842 0.0258)
OKLCH	oklch(23.87% 0.088 17)
XYZ	xyz(2.1798, 1.1784, 0.5645)
Luminance	0.0118 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F040F #043F34

analogous

#3F042C #3F040F #3F1604

triadic

#3F040F #0F3F04 #040F3F

tetradic

#3F040F #2C3F04 #043F34 #16043F

square

#3F040F #2C3F04 #043F34 #16043F

split-complementary

#3F040F #043F16 #042C3F

monochromatic

#1D0207 #1D0207 #3F040F #79081D #B20B2A

Accessibility & contrast

On white

17.00

#3F040F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#3F040F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F040F

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F040F	#FFFFFF	#000000	##FFFFFF
##3F040F	1.00	17.00	1.24	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140F

Deuteranopia (green-blind)

#25210D

Tritanopia (blue-blind)

#460008

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #3f040f;
/* rgb */ color: rgb(63, 4, 15);
/* oklch */ color: oklch(23.9% 0.088 17.0);

Tailwind

colors: {
  custom: {
    50: '#794b4d',
    500: '#3f040f',
    950: '#000000',
  },
}

SCSS

$custom: #3f040f;
$custom-light: #794b4d;
$custom-dark: #000000;

JSON

{
  "hex": "#3f040f",
  "rgb": {
    "r": 63,
    "g": 4,
    "b": 15
  },
  "hsl": {
    "h": 348.814,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23866,
    "c": 0.08802,
    "h": 17
  },
  "luminance": 0.01178
}

Semantic roles & 50–950 ramp

primary

#3F040F

secondary

#1E806E

accent

#FED72A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #3F040F

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

Preview Lab → · Contrast checker → · Palette generator →