#66181F#66181F

#66181F is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.110 H 20.4°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#66181F
RGB	rgb(102, 24, 31)
HSL	hsl(355, 62%, 25%)
HSV	hsv(355, 76%, 40%)
CMYK	cmyk(0%, 76.5%, 69.6%, 60%)
CIE-LAB	lab(22.22, 34.92, 16.23)
CIE-LCH	lch(22.22, 38.51, 24.93°)
OKLab	oklab(34.31% 0.1033 0.0385)
OKLCH	oklch(34.31% 0.11 20.4)
XYZ	xyz(6.0541, 3.5779, 1.6679)
Luminance	0.0358 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66181F #18665F

analogous

#661846 #66181F #663818

triadic

#66181F #1F6618 #181F66

tetradic

#66181F #466618 #18665F #381866

square

#66181F #466618 #18665F #381866

split-complementary

#66181F #186638 #184666

monochromatic

#190608 #340C10 #66181F #98242E #C92F3D

Accessibility & contrast

On white

12.24

#66181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#66181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66181F

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66181F	#FFFFFF	#000000	##FFFFFF
##66181F	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2B1F

Deuteranopia (green-blind)

#413B1D

Tritanopia (blue-blind)

#71001B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #66181f;
/* rgb */ color: rgb(102, 24, 31);
/* oklch */ color: oklch(34.3% 0.110 20.4);

Tailwind

colors: {
  custom: {
    50: '#985c5a',
    500: '#66181f',
    950: '#000000',
  },
}

SCSS

$custom: #66181f;
$custom-light: #985c5a;
$custom-dark: #000000;

JSON

{
  "hex": "#66181f",
  "rgb": {
    "r": 102,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 354.615,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34307,
    "c": 0.11019,
    "h": 20.4
  },
  "luminance": 0.03577
}

Semantic roles & 50–950 ramp

primary

#66181F

secondary

#3E9C94

accent

#E5D643

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #66181F

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

Preview Lab → · Contrast checker → · Palette generator →