#6B181B#6B181B

#6B181B is a dark, moderate red. Relative luminance 0.039; OKLCH L 35.2% C 0.116 H 23.7°. Best body text is #FFFFFF at 11.85:1 contrast (WCAG AA passes).

Color values

HEX	#6B181B
RGB	rgb(107, 24, 27)
HSL	hsl(358, 63%, 26%)
HSV	hsv(358, 78%, 42%)
CMYK	cmyk(0%, 77.6%, 74.8%, 58%)
CIE-LAB	lab(23.20, 36.43, 20.35)
CIE-LCH	lch(23.20, 41.73, 29.19°)
OKLab	oklab(35.2% 0.1064 0.0467)
OKLCH	oklch(35.2% 0.116 23.7)
XYZ	xyz(6.5886, 3.8592, 1.4347)
Luminance	0.0386 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6B181B #186B68

analogous

#6B1844 #6B181B #6B3E18

triadic

#6B181B #1B6B18 #181B6B

tetradic

#6B181B #446B18 #186B68 #3E186B

square

#6B181B #446B18 #186B68 #3E186B

split-complementary

#6B181B #186B3E #18446B

monochromatic

#190606 #390D0E #6B181B #9D2328 #CF2E34

Accessibility & contrast

On white

11.85

#6B181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#6B181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #6B181B

11.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6B181B	#FFFFFF	#000000	##FFFFFF
##6B181B	1.00	11.85	1.77	11.85
#FFFFFF	11.85	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302C1A

Deuteranopia (green-blind)

#453E18

Tritanopia (blue-blind)

#76001A

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #6b181b;
/* rgb */ color: rgb(107, 24, 27);
/* oklch */ color: oklch(35.2% 0.116 23.7);

Tailwind

colors: {
  custom: {
    50: '#9c5c57',
    500: '#6b181b',
    950: '#000000',
  },
}

SCSS

$custom: #6b181b;
$custom-light: #9c5c57;
$custom-dark: #000000;

JSON

{
  "hex": "#6b181b",
  "rgb": {
    "r": 107,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 357.831,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.35202,
    "c": 0.11619,
    "h": 23.7
  },
  "luminance": 0.03858
}

Semantic roles & 50–950 ramp

primary

#6B181B

secondary

#3EA19D

accent

#E6E041

background

#FAF5F5

surface

#F4E9E9

border

#CEC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #6B181B

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

Preview Lab → · Contrast checker → · Palette generator →