#64181C#64181C

#64181C is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.9% C 0.108 H 22.4°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#64181C
RGB	rgb(100, 24, 28)
HSL	hsl(357, 61%, 24%)
HSV	hsv(357, 76%, 39%)
CMYK	cmyk(0%, 76%, 72%, 60.8%)
CIE-LAB	lab(21.75, 34.03, 17.59)
CIE-LCH	lch(21.75, 38.31, 27.33°)
OKLab	oklab(33.86% 0.1 0.0412)
OKLCH	oklch(33.86% 0.108 22.4)
XYZ	xyz(5.7924, 3.4473, 1.4588)
Luminance	0.0345 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#64181C #186460

analogous

#641842 #64181C #643A18

triadic

#64181C #1C6418 #181C64

tetradic

#64181C #426418 #186460 #3A1864

square

#64181C #426418 #186460 #3A1864

split-complementary

#64181C #18643A #184264

monochromatic

#190607 #330C0E #64181C #95242A #C73038

Accessibility & contrast

On white

12.43

#64181C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#64181C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #64181C

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##64181C	#FFFFFF	#000000	##FFFFFF
##64181C	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D2A1B

Deuteranopia (green-blind)

#403A1A

Tritanopia (blue-blind)

#6E011A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #64181c;
/* rgb */ color: rgb(100, 24, 28);
/* oklch */ color: oklch(33.9% 0.108 22.4);

Tailwind

colors: {
  custom: {
    50: '#965b58',
    500: '#64181c',
    950: '#000000',
  },
}

SCSS

$custom: #64181c;
$custom-light: #965b58;
$custom-dark: #000000;

JSON

{
  "hex": "#64181c",
  "rgb": {
    "r": 100,
    "g": 24,
    "b": 28
  },
  "hsl": {
    "h": 356.842,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.33863,
    "c": 0.10815,
    "h": 22.4
  },
  "luminance": 0.03446
}

Semantic roles & 50–950 ramp

primary

#64181C

secondary

#3E9A95

accent

#E4DC43

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #64181C

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

Preview Lab → · Contrast checker → · Palette generator →