#66181D#66181D

#66181D is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.110 H 21.9°. Best body text is #FFFFFF at 12.26:1 contrast (WCAG AA passes).

Color values

HEX	#66181D
RGB	rgb(102, 24, 29)
HSL	hsl(356, 62%, 25%)
HSV	hsv(356, 76%, 40%)
CMYK	cmyk(0%, 76.5%, 71.6%, 60%)
CIE-LAB	lab(22.19, 34.80, 17.54)
CIE-LCH	lch(22.19, 38.97, 26.75°)
OKLab	oklab(34.27% 0.1024 0.0411)
OKLCH	oklch(34.27% 0.11 21.9)
XYZ	xyz(6.0285, 3.5677, 1.5333)
Luminance	0.0357 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66181D #186661

analogous

#661844 #66181D #663A18

triadic

#66181D #1D6618 #181D66

tetradic

#66181D #446618 #186661 #3A1866

square

#66181D #446618 #186661 #3A1866

split-complementary

#66181D #18663A #184466

monochromatic

#190607 #340C0F #66181D #98242B #C92F39

Accessibility & contrast

On white

12.26

#66181D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#66181D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66181D

12.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66181D	#FFFFFF	#000000	##FFFFFF
##66181D	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)

#2E2A1D

Deuteranopia (green-blind)

#423B1B

Tritanopia (blue-blind)

#71001B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #66181d;
/* rgb */ color: rgb(102, 24, 29);
/* oklch */ color: oklch(34.3% 0.110 21.9);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#66181d",
  "rgb": {
    "r": 102,
    "g": 24,
    "b": 29
  },
  "hsl": {
    "h": 356.154,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34268,
    "c": 0.11034,
    "h": 21.9
  },
  "luminance": 0.03567
}

Semantic roles & 50–950 ramp

primary

#66181D

secondary

#3E9C96

accent

#E5DB43

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #66181D

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

Preview Lab → · Contrast checker → · Palette generator →