#66181B#66181B

#66181B is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.2% C 0.111 H 23.3°. Best body text is #FFFFFF at 12.27:1 contrast (WCAG AA passes).

Color values

HEX	#66181B
RGB	rgb(102, 24, 27)
HSL	hsl(358, 62%, 25%)
HSV	hsv(358, 76%, 40%)
CMYK	cmyk(0%, 76.5%, 73.5%, 60%)
CIE-LAB	lab(22.15, 34.68, 18.85)
CIE-LCH	lch(22.15, 39.47, 28.52°)
OKLab	oklab(34.23% 0.1016 0.0437)
OKLCH	oklch(34.23% 0.111 23.3)
XYZ	xyz(6.0046, 3.5581, 1.4073)
Luminance	0.0356 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66181B #186663

analogous

#661842 #66181B #663C18

triadic

#66181B #1B6618 #181B66

tetradic

#66181B #426618 #186663 #3C1866

square

#66181B #426618 #186663 #3C1866

split-complementary

#66181B #18663C #184266

monochromatic

#190607 #340C0E #66181B #982428 #C92F35

Accessibility & contrast

On white

12.27

#66181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#66181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66181B

12.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66181B	#FFFFFF	#000000	##FFFFFF
##66181B	1.00	12.27	1.71	12.27
#FFFFFF	12.27	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2A1A

Deuteranopia (green-blind)

#423B19

Tritanopia (blue-blind)

#71001A

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #66181b;
/* rgb */ color: rgb(102, 24, 27);
/* oklch */ color: oklch(34.2% 0.111 23.3);

Tailwind

colors: {
  custom: {
    50: '#985b57',
    500: '#66181b',
    950: '#000000',
  },
}

SCSS

$custom: #66181b;
$custom-light: #985b57;
$custom-dark: #000000;

JSON

{
  "hex": "#66181b",
  "rgb": {
    "r": 102,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 357.692,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34232,
    "c": 0.11055,
    "h": 23.3
  },
  "luminance": 0.03557
}

Semantic roles & 50–950 ramp

primary

#66181B

secondary

#3E9C98

accent

#E5DF43

background

#FAF5F5

surface

#F3E9E9

border

#CDC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #66181B

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

Preview Lab → · Contrast checker → · Palette generator →