#3F090A#3F090A

#3F090A is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.4% C 0.082 H 24.9°. Best body text is #FFFFFF at 16.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F090A
RGB	rgb(63, 9, 10)
HSL	hsl(359, 75%, 14%)
HSV	hsv(359, 86%, 25%)
CMYK	cmyk(0%, 85.7%, 84.1%, 75.3%)
CIE-LAB	lab(11.10, 25.76, 13.16)
CIE-LCH	lch(11.10, 28.93, 27.07°)
OKLab	oklab(24.35% 0.0748 0.0348)
OKLCH	oklch(24.35% 0.082 24.9)
XYZ	xyz(2.2026, 1.2744, 0.4171)
Luminance	0.0127 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F090A #093F3E

analogous

#3F0925 #3F090A #3F2309

triadic

#3F090A #0A3F09 #090A3F

tetradic

#3F090A #253F09 #093F3E #23093F

square

#3F090A #253F09 #093F3E #23093F

split-complementary

#3F090A #093F23 #09253F

monochromatic

#1B0404 #1B0404 #3F090A #751113 #AA181B

Accessibility & contrast

On white

16.74

#3F090A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#3F090A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F090A

16.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F090A	#FFFFFF	#000000	##FFFFFF
##3F090A	1.00	16.74	1.25	16.74
#FFFFFF	16.74	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#191609

Deuteranopia (green-blind)

#272208

Tritanopia (blue-blind)

#46000A

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #3f090a;
/* rgb */ color: rgb(63, 9, 10);
/* oklch */ color: oklch(24.4% 0.082 24.9);

Tailwind

colors: {
  custom: {
    50: '#794e4b',
    500: '#3f090a',
    950: '#000000',
  },
}

SCSS

$custom: #3f090a;
$custom-light: #794e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#3f090a",
  "rgb": {
    "r": 63,
    "g": 9,
    "b": 10
  },
  "hsl": {
    "h": 358.889,
    "s": 75,
    "l": 14.118
  },
  "oklch": {
    "l": 0.24354,
    "c": 0.08246,
    "h": 24.9
  },
  "luminance": 0.01274
}

Semantic roles & 50–950 ramp

primary

#3F090A

secondary

#277D7B

accent

#F2EE36

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #3F090A

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

Preview Lab → · Contrast checker → · Palette generator →