#66181E#66181E

#66181E is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.110 H 21.2°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#66181E
RGB	rgb(102, 24, 30)
HSL	hsl(355, 62%, 25%)
HSV	hsv(355, 76%, 40%)
CMYK	cmyk(0%, 76.5%, 70.6%, 60%)
CIE-LAB	lab(22.21, 34.86, 16.89)
CIE-LCH	lch(22.21, 38.74, 25.85°)
OKLab	oklab(34.29% 0.1028 0.0398)
OKLCH	oklch(34.29% 0.11 21.2)
XYZ	xyz(6.0411, 3.5727, 1.5995)
Luminance	0.0357 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66181E #186660

analogous

#661845 #66181E #663918

triadic

#66181E #1E6618 #181E66

tetradic

#66181E #456618 #186660 #391866

square

#66181E #456618 #186660 #391866

split-complementary

#66181E #186639 #184566

monochromatic

#190607 #340C0F #66181E #98242D #C92F3B

Accessibility & contrast

On white

12.25

#66181E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#66181E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66181E

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66181E	#FFFFFF	#000000	##FFFFFF
##66181E	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2B1E

Deuteranopia (green-blind)

#423B1C

Tritanopia (blue-blind)

#71001B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #66181e;
/* rgb */ color: rgb(102, 24, 30);
/* oklch */ color: oklch(34.3% 0.110 21.2);

Tailwind

colors: {
  custom: {
    50: '#985b59',
    500: '#66181e',
    950: '#000000',
  },
}

SCSS

$custom: #66181e;
$custom-light: #985b59;
$custom-dark: #000000;

JSON

{
  "hex": "#66181e",
  "rgb": {
    "r": 102,
    "g": 24,
    "b": 30
  },
  "hsl": {
    "h": 355.385,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34288,
    "c": 0.11026,
    "h": 21.2
  },
  "luminance": 0.03572
}

Semantic roles & 50–950 ramp

primary

#66181E

secondary

#3E9C95

accent

#E5D943

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #66181E

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

Preview Lab → · Contrast checker → · Palette generator →