#66101F#66101F

#66101F is a dark, moderate red. Relative luminance 0.033; OKLCH L 33.5% C 0.118 H 17.5°. Best body text is #FFFFFF at 12.66:1 contrast (WCAG AA passes).

Color values

HEX	#66101F
RGB	rgb(102, 16, 31)
HSL	hsl(350, 73%, 23%)
HSV	hsv(350, 84%, 40%)
CMYK	cmyk(0%, 84.3%, 69.6%, 60%)
CIE-LAB	lab(21.19, 37.82, 14.92)
CIE-LCH	lch(21.19, 40.66, 21.53°)
OKLab	oklab(33.54% 0.1125 0.0355)
OKLCH	oklch(33.54% 0.118 17.5)
XYZ	xyz(5.9128, 3.2952, 1.6208)
Luminance	0.0329 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66101F #106657

analogous

#66104A #66101F #662C10

triadic

#66101F #1F6610 #101F66

tetradic

#66101F #4A6610 #106657 #2C1066

square

#66101F #4A6610 #106657 #2C1066

split-complementary

#66101F #10662C #104A66

monochromatic

#1A0408 #31080F #66101F #9B182F #D0213F

Accessibility & contrast

On white

12.66

#66101F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#66101F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66101F

12.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66101F	#FFFFFF	#000000	##FFFFFF
##66101F	1.00	12.66	1.66	12.66
#FFFFFF	12.66	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271F

Deuteranopia (green-blind)

#3F391C

Tritanopia (blue-blind)

#710017

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #66101f;
/* rgb */ color: rgb(102, 16, 31);
/* oklch */ color: oklch(33.5% 0.118 17.5);

Tailwind

colors: {
  custom: {
    50: '#98585a',
    500: '#66101f',
    950: '#000000',
  },
}

SCSS

$custom: #66101f;
$custom-light: #98585a;
$custom-dark: #000000;

JSON

{
  "hex": "#66101f",
  "rgb": {
    "r": 102,
    "g": 16,
    "b": 31
  },
  "hsl": {
    "h": 349.535,
    "s": 72.881,
    "l": 23.137
  },
  "oklch": {
    "l": 0.3354,
    "c": 0.11798,
    "h": 17.5
  },
  "luminance": 0.03294
}

Semantic roles & 50–950 ramp

primary

#66101F

secondary

#339E8C

accent

#F0D038

background

#FAF5F5

surface

#F3E9E9

border

#CDC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #66101F

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

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