#66101B#66101B

#66101B is a dark, moderate red. Relative luminance 0.033; OKLCH L 33.5% C 0.118 H 20.3°. Best body text is #FFFFFF at 12.69:1 contrast (WCAG AA passes).

Color values

HEX	#66101B
RGB	rgb(102, 16, 27)
HSL	hsl(352, 73%, 23%)
HSV	hsv(352, 84%, 40%)
CMYK	cmyk(0%, 84.3%, 73.5%, 60%)
CIE-LAB	lab(21.11, 37.59, 17.58)
CIE-LCH	lch(21.11, 41.50, 25.07°)
OKLab	oklab(33.46% 0.1108 0.0409)
OKLCH	oklch(33.46% 0.118 20.3)
XYZ	xyz(5.8633, 3.2754, 1.3602)
Luminance	0.0327 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66101B #10665B

analogous

#661046 #66101B #663010

triadic

#66101B #1B6610 #101B66

tetradic

#66101B #466610 #10665B #301066

square

#66101B #466610 #10665B #301066

split-complementary

#66101B #106630 #104666

monochromatic

#1A0407 #31080D #66101B #9B1829 #D02137

Accessibility & contrast

On white

12.69

#66101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#66101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66101B

12.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66101B	#FFFFFF	#000000	##FFFFFF
##66101B	1.00	12.69	1.65	12.69
#FFFFFF	12.69	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271B

Deuteranopia (green-blind)

#403918

Tritanopia (blue-blind)

#710015

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #66101b;
/* rgb */ color: rgb(102, 16, 27);
/* oklch */ color: oklch(33.5% 0.118 20.3);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#66101b",
  "rgb": {
    "r": 102,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 352.326,
    "s": 72.881,
    "l": 23.137
  },
  "oklch": {
    "l": 0.3346,
    "c": 0.1181,
    "h": 20.3
  },
  "luminance": 0.03274
}

Semantic roles & 50–950 ramp

primary

#66101B

secondary

#339E91

accent

#F0D838

background

#FAF5F5

surface

#F3E9E9

border

#CDC5C5

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #66101B

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

Preview Lab → · Contrast checker → · Palette generator →