#64181B#64181B

#64181B is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.8% C 0.108 H 23.1°. Best body text is #FFFFFF at 12.44:1 contrast (WCAG AA passes).

Color values

HEX	#64181B
RGB	rgb(100, 24, 27)
HSL	hsl(358, 61%, 24%)
HSV	hsv(358, 76%, 39%)
CMYK	cmyk(0%, 76%, 73%, 60.8%)
CIE-LAB	lab(21.74, 33.98, 18.24)
CIE-LCH	lch(21.74, 38.56, 28.23°)
OKLab	oklab(33.85% 0.0996 0.0425)
OKLCH	oklch(33.85% 0.108 23.1)
XYZ	xyz(5.7806, 3.4426, 1.3968)
Luminance	0.0344 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#64181B #186461

analogous

#641841 #64181B #643B18

triadic

#64181B #1B6418 #181B64

tetradic

#64181B #416418 #186461 #3B1864

square

#64181B #416418 #186461 #3B1864

split-complementary

#64181B #18643B #184164

monochromatic

#190607 #330C0E #64181B #952428 #C73036

Accessibility & contrast

On white

12.44

#64181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#64181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #64181B

12.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##64181B	#FFFFFF	#000000	##FFFFFF
##64181B	1.00	12.44	1.69	12.44
#FFFFFF	12.44	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D2A1A

Deuteranopia (green-blind)

#413A19

Tritanopia (blue-blind)

#6E001A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #64181b;
/* rgb */ color: rgb(100, 24, 27);
/* oklch */ color: oklch(33.8% 0.108 23.1);

Tailwind

colors: {
  custom: {
    50: '#965b57',
    500: '#64181b',
    950: '#000000',
  },
}

SCSS

$custom: #64181b;
$custom-light: #965b57;
$custom-dark: #000000;

JSON

{
  "hex": "#64181b",
  "rgb": {
    "r": 100,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 357.632,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.33845,
    "c": 0.10825,
    "h": 23.1
  },
  "luminance": 0.03442
}

Semantic roles & 50–950 ramp

primary

#64181B

secondary

#3E9A97

accent

#E4DE43

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #64181B

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

Preview Lab → · Contrast checker → · Palette generator →