#6B181F#6B181F

#6B181F is a dark, moderate red. Relative luminance 0.039; OKLCH L 35.3% C 0.116 H 21.1°. Best body text is #FFFFFF at 11.83:1 contrast (WCAG AA passes).

Color values

HEX	#6B181F
RGB	rgb(107, 24, 31)
HSL	hsl(355, 63%, 26%)
HSV	hsv(355, 78%, 42%)
CMYK	cmyk(0%, 77.6%, 71%, 58%)
CIE-LAB	lab(23.27, 36.65, 17.76)
CIE-LCH	lch(23.27, 40.73, 25.86°)
OKLab	oklab(35.27% 0.108 0.0417)
OKLCH	oklch(35.27% 0.116 21.1)
XYZ	xyz(6.6381, 3.8790, 1.6952)
Luminance	0.0388 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6B181F #186B64

analogous

#6B1848 #6B181F #6B3A18

triadic

#6B181F #1F6B18 #181F6B

tetradic

#6B181F #486B18 #186B64 #3A186B

square

#6B181F #486B18 #186B64 #3A186B

split-complementary

#6B181F #186B3A #18486B

monochromatic

#190607 #390D11 #6B181F #9D232D #CF2E3C

Accessibility & contrast

On white

11.83

#6B181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#6B181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #6B181F

11.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6B181F	#FFFFFF	#000000	##FFFFFF
##6B181F	1.00	11.83	1.78	11.83
#FFFFFF	11.83	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302C1F

Deuteranopia (green-blind)

#453E1C

Tritanopia (blue-blind)

#76001B

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #6b181f;
/* rgb */ color: rgb(107, 24, 31);
/* oklch */ color: oklch(35.3% 0.116 21.1);

Tailwind

colors: {
  custom: {
    50: '#9c5c5a',
    500: '#6b181f',
    950: '#000000',
  },
}

SCSS

$custom: #6b181f;
$custom-light: #9c5c5a;
$custom-dark: #000000;

JSON

{
  "hex": "#6b181f",
  "rgb": {
    "r": 107,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 354.94,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35274,
    "c": 0.1158,
    "h": 21.1
  },
  "luminance": 0.03878
}

Semantic roles & 50–950 ramp

primary

#6B181F

secondary

#3EA198

accent

#E6D841

background

#FAF5F5

surface

#F4E9E9

border

#CEC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #6B181F

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

Preview Lab → · Contrast checker → · Palette generator →