#66101D#66101D

#66101D is a dark, moderate red. Relative luminance 0.033; OKLCH L 33.5% C 0.118 H 18.9°. Best body text is #FFFFFF at 12.68:1 contrast (WCAG AA passes).

Color values

HEX	#66101D
RGB	rgb(102, 16, 29)
HSL	hsl(351, 73%, 23%)
HSV	hsv(351, 84%, 40%)
CMYK	cmyk(0%, 84.3%, 71.6%, 60%)
CIE-LAB	lab(21.15, 37.70, 16.26)
CIE-LCH	lch(21.15, 41.05, 23.33°)
OKLab	oklab(33.5% 0.1117 0.0383)
OKLCH	oklch(33.5% 0.118 18.9)
XYZ	xyz(5.8872, 3.2850, 1.4862)
Luminance	0.0328 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66101D #106659

analogous

#661048 #66101D #662E10

triadic

#66101D #1D6610 #101D66

tetradic

#66101D #486610 #106659 #2E1066

square

#66101D #486610 #106659 #2E1066

split-complementary

#66101D #10662E #104866

monochromatic

#1A0408 #31080E #66101D #9B182C #D0213B

Accessibility & contrast

On white

12.68

#66101D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#66101D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66101D

12.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66101D	#FFFFFF	#000000	##FFFFFF
##66101D	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)

#2A271D

Deuteranopia (green-blind)

#3F391A

Tritanopia (blue-blind)

#710016

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #66101d;
/* rgb */ color: rgb(102, 16, 29);
/* oklch */ color: oklch(33.5% 0.118 18.9);

Tailwind

colors: {
  custom: {
    50: '#985858',
    500: '#66101d',
    950: '#000000',
  },
}

SCSS

$custom: #66101d;
$custom-light: #985858;
$custom-dark: #000000;

JSON

{
  "hex": "#66101d",
  "rgb": {
    "r": 102,
    "g": 16,
    "b": 29
  },
  "hsl": {
    "h": 350.93,
    "s": 72.881,
    "l": 23.137
  },
  "oklch": {
    "l": 0.33499,
    "c": 0.11802,
    "h": 18.9
  },
  "luminance": 0.03284
}

Semantic roles & 50–950 ramp

primary

#66101D

secondary

#339E8E

accent

#F0D438

background

#FAF5F5

surface

#F3E9E9

border

#CDC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #66101D

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

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