#66101C#66101C

#66101C is a dark, moderate red. Relative luminance 0.033; OKLCH L 33.5% C 0.118 H 19.6°. Best body text is #FFFFFF at 12.68:1 contrast (WCAG AA passes).

Color values

HEX	#66101C
RGB	rgb(102, 16, 28)
HSL	hsl(352, 73%, 23%)
HSV	hsv(352, 84%, 40%)
CMYK	cmyk(0%, 84.3%, 72.5%, 60%)
CIE-LAB	lab(21.13, 37.64, 16.92)
CIE-LCH	lch(21.13, 41.27, 24.21°)
OKLab	oklab(33.48% 0.1112 0.0396)
OKLCH	oklch(33.48% 0.118 19.6)
XYZ	xyz(5.8750, 3.2801, 1.4222)
Luminance	0.0328 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66101C #10665A

analogous

#661047 #66101C #662F10

triadic

#66101C #1C6610 #101C66

tetradic

#66101C #476610 #10665A #2F1066

square

#66101C #476610 #10665A #2F1066

split-complementary

#66101C #10662F #104766

monochromatic

#1A0407 #31080D #66101C #9B182B #D02139

Accessibility & contrast

On white

12.68

#66101C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#66101C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66101C

12.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66101C	#FFFFFF	#000000	##FFFFFF
##66101C	1.00	12.68	1.66	12.68
#FFFFFF	12.68	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271C

Deuteranopia (green-blind)

#403919

Tritanopia (blue-blind)

#710015

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #66101c;
/* rgb */ color: rgb(102, 16, 28);
/* oklch */ color: oklch(33.5% 0.118 19.6);

Tailwind

colors: {
  custom: {
    50: '#985857',
    500: '#66101c',
    950: '#000000',
  },
}

SCSS

$custom: #66101c;
$custom-light: #985857;
$custom-dark: #000000;

JSON

{
  "hex": "#66101c",
  "rgb": {
    "r": 102,
    "g": 16,
    "b": 28
  },
  "hsl": {
    "h": 351.628,
    "s": 72.881,
    "l": 23.137
  },
  "oklch": {
    "l": 0.33479,
    "c": 0.11805,
    "h": 19.6
  },
  "luminance": 0.03279
}

Semantic roles & 50–950 ramp

primary

#66101C

secondary

#339E8F

accent

#F0D638

background

#FAF5F5

surface

#F3E9E9

border

#CDC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #66101C

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

Preview Lab → · Contrast checker → · Palette generator →