#66181C#66181C

#66181C is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.110 H 22.6°. Best body text is #FFFFFF at 12.26:1 contrast (WCAG AA passes).

Color values

HEX	#66181C
RGB	rgb(102, 24, 28)
HSL	hsl(357, 62%, 25%)
HSV	hsv(357, 76%, 40%)
CMYK	cmyk(0%, 76.5%, 72.5%, 60%)
CIE-LAB	lab(22.17, 34.74, 18.20)
CIE-LCH	lch(22.17, 39.22, 27.64°)
OKLab	oklab(34.25% 0.102 0.0424)
OKLCH	oklch(34.25% 0.11 22.6)
XYZ	xyz(6.0164, 3.5628, 1.4693)
Luminance	0.0356 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66181C #186662

analogous

#661843 #66181C #663B18

triadic

#66181C #1C6618 #181C66

tetradic

#66181C #436618 #186662 #3B1866

square

#66181C #436618 #186662 #3B1866

split-complementary

#66181C #18663B #184366

monochromatic

#190607 #340C0E #66181C #98242A #C92F37

Accessibility & contrast

On white

12.26

#66181C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#66181C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66181C

12.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66181C	#FFFFFF	#000000	##FFFFFF
##66181C	1.00	12.26	1.71	12.26
#FFFFFF	12.26	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2A1B

Deuteranopia (green-blind)

#423B1A

Tritanopia (blue-blind)

#71001A

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #66181c;
/* rgb */ color: rgb(102, 24, 28);
/* oklch */ color: oklch(34.3% 0.110 22.6);

Tailwind

colors: {
  custom: {
    50: '#985b58',
    500: '#66181c',
    950: '#000000',
  },
}

SCSS

$custom: #66181c;
$custom-light: #985b58;
$custom-dark: #000000;

JSON

{
  "hex": "#66181c",
  "rgb": {
    "r": 102,
    "g": 24,
    "b": 28
  },
  "hsl": {
    "h": 356.923,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.3425,
    "c": 0.11044,
    "h": 22.6
  },
  "luminance": 0.03562
}

Semantic roles & 50–950 ramp

primary

#66181C

secondary

#3E9C97

accent

#E5DD43

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #66181C

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

Preview Lab → · Contrast checker → · Palette generator →