#3F070B#3F070B

#3F070B is a very dark, moderate red. Relative luminance 0.012; OKLCH L 24.1% C 0.085 H 22.8°. Best body text is #FFFFFF at 16.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F070B
RGB	rgb(63, 7, 11)
HSL	hsl(356, 80%, 14%)
HSV	hsv(356, 89%, 25%)
CMYK	cmyk(0%, 88.9%, 82.5%, 75.3%)
CIE-LAB	lab(10.80, 26.68, 12.34)
CIE-LCH	lch(10.80, 29.40, 24.81°)
OKLab	oklab(24.14% 0.078 0.0327)
OKLCH	oklch(24.14% 0.085 22.8)
XYZ	xyz(2.1865, 1.2332, 0.4394)
Luminance	0.0123 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F070B #073F3B

analogous

#3F0727 #3F070B #3F1F07

triadic

#3F070B #0B3F07 #070B3F

tetradic

#3F070B #273F07 #073F3B #1F073F

square

#3F070B #273F07 #073F3B #1F073F

split-complementary

#3F070B #073F1F #07273F

monochromatic

#1C0305 #1C0305 #3F070B #760D15 #AD131E

Accessibility & contrast

On white

16.85

#3F070B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#3F070B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F070B

16.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F070B	#FFFFFF	#000000	##FFFFFF
##3F070B	1.00	16.85	1.25	16.85
#FFFFFF	16.85	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18150B

Deuteranopia (green-blind)

#262109

Tritanopia (blue-blind)

#460009

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #3f070b;
/* rgb */ color: rgb(63, 7, 11);
/* oklch */ color: oklch(24.1% 0.085 22.8);

Tailwind

colors: {
  custom: {
    50: '#794d4b',
    500: '#3f070b',
    950: '#000000',
  },
}

SCSS

$custom: #3f070b;
$custom-light: #794d4b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f070b",
  "rgb": {
    "r": 63,
    "g": 7,
    "b": 11
  },
  "hsl": {
    "h": 355.714,
    "s": 80,
    "l": 13.725
  },
  "oklch": {
    "l": 0.2414,
    "c": 0.08456,
    "h": 22.8
  },
  "luminance": 0.01233
}

Semantic roles & 50–950 ramp

primary

#3F070B

secondary

#247E78

accent

#F6E831

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #3F070B

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

Preview Lab → · Contrast checker → · Palette generator →