#6B181D#6B181D

#6B181D is a dark, moderate red. Relative luminance 0.039; OKLCH L 35.2% C 0.116 H 22.4°. Best body text is #FFFFFF at 11.84:1 contrast (WCAG AA passes).

Color values

HEX	#6B181D
RGB	rgb(107, 24, 29)
HSL	hsl(356, 63%, 26%)
HSV	hsv(356, 78%, 42%)
CMYK	cmyk(0%, 77.6%, 72.9%, 58%)
CIE-LAB	lab(23.23, 36.54, 19.06)
CIE-LCH	lch(23.23, 41.21, 27.55°)
OKLab	oklab(35.24% 0.1072 0.0443)
OKLCH	oklch(35.24% 0.116 22.4)
XYZ	xyz(6.6125, 3.8688, 1.5607)
Luminance	0.0387 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6B181D #186B66

analogous

#6B1846 #6B181D #6B3C18

triadic

#6B181D #1D6B18 #181D6B

tetradic

#6B181D #466B18 #186B66 #3C186B

square

#6B181D #466B18 #186B66 #3C186B

split-complementary

#6B181D #186B3C #18466B

monochromatic

#190607 #390D0F #6B181D #9D232B #CF2E38

Accessibility & contrast

On white

11.84

#6B181D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#6B181D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #6B181D

11.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6B181D	#FFFFFF	#000000	##FFFFFF
##6B181D	1.00	11.84	1.77	11.84
#FFFFFF	11.84	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302C1C

Deuteranopia (green-blind)

#453E1A

Tritanopia (blue-blind)

#76001B

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #6b181d;
/* rgb */ color: rgb(107, 24, 29);
/* oklch */ color: oklch(35.2% 0.116 22.4);

Tailwind

colors: {
  custom: {
    50: '#9c5c59',
    500: '#6b181d',
    950: '#000000',
  },
}

SCSS

$custom: #6b181d;
$custom-light: #9c5c59;
$custom-dark: #000000;

JSON

{
  "hex": "#6b181d",
  "rgb": {
    "r": 107,
    "g": 24,
    "b": 29
  },
  "hsl": {
    "h": 356.386,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35237,
    "c": 0.11597,
    "h": 22.4
  },
  "luminance": 0.03868
}

Semantic roles & 50–950 ramp

primary

#6B181D

secondary

#3EA19B

accent

#E6DC41

background

#FAF5F5

surface

#F4E9E9

border

#CEC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #6B181D

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

Preview Lab → · Contrast checker → · Palette generator →