#66100F#66100F

#66100F is a dark, moderate red. Relative luminance 0.032; OKLCH L 33.3% C 0.119 H 27.1°. Best body text is #FFFFFF at 12.76:1 contrast (WCAG AA passes).

Color values

HEX	#66100F
RGB	rgb(102, 16, 15)
HSL	hsl(1, 74%, 23%)
HSV	hsv(1, 85%, 40%)
CMYK	cmyk(0%, 84.3%, 85.3%, 60%)
CIE-LAB	lab(20.95, 37.05, 25.06)
CIE-LCH	lch(20.95, 44.73, 34.07°)
OKLab	oklab(33.28% 0.1062 0.0544)
OKLCH	oklch(33.28% 0.119 27.1)
XYZ	xyz(5.7517, 3.2308, 0.7726)
Luminance	0.0323 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66100F #0F6566

analogous

#660F39 #66100F #663C0F

triadic

#66100F #0F6610 #100F66

tetradic

#66100F #39660F #0F6566 #3C0F66

square

#66100F #39660F #0F6566 #3C0F66

split-complementary

#66100F #0F663C #0F3966

monochromatic

#1B0404 #310807 #66100F #9B1817 #D1211F

Accessibility & contrast

On white

12.76

#66100F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#66100F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66100F

12.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66100F	#FFFFFF	#000000	##FFFFFF
##66100F	1.00	12.76	1.65	12.76
#FFFFFF	12.76	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C260E

Deuteranopia (green-blind)

#41390B

Tritanopia (blue-blind)

#710011

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #66100f;
/* rgb */ color: rgb(102, 16, 15);
/* oklch */ color: oklch(33.3% 0.119 27.1);

Tailwind

colors: {
  custom: {
    50: '#99584e',
    500: '#66100f',
    950: '#000000',
  },
}

SCSS

$custom: #66100f;
$custom-light: #99584e;
$custom-dark: #000000;

JSON

{
  "hex": "#66100f",
  "rgb": {
    "r": 102,
    "g": 16,
    "b": 15
  },
  "hsl": {
    "h": 0.69,
    "s": 74.359,
    "l": 22.941
  },
  "oklch": {
    "l": 0.33281,
    "c": 0.11931,
    "h": 27.1
  },
  "luminance": 0.0323
}

Semantic roles & 50–950 ramp

primary

#66100F

secondary

#329D9F

accent

#EFF137

background

#FAF5F4

surface

#F4E9E7

border

#CEC5C3

text

#0F0401

muted

#7F7977

Preview Lab

Preview with #66100F

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

Preview Lab → · Contrast checker → · Palette generator →