#661D1D#661D1D

#661D1D is a dark, moderate red. Relative luminance 0.038; OKLCH L 34.9% C 0.105 H 24.4°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#661D1D
RGB	rgb(102, 29, 29)
HSL	hsl(0, 56%, 26%)
HSV	hsv(0, 72%, 40%)
CMYK	cmyk(0%, 71.6%, 71.6%, 60%)
CIE-LAB	lab(22.98, 32.64, 18.51)
CIE-LCH	lch(22.98, 37.52, 29.56°)
OKLab	oklab(34.86% 0.0955 0.0433)
OKLCH	oklch(34.86% 0.105 24.4)
XYZ	xyz(6.1413, 3.7931, 1.5709)
Luminance	0.0379 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661D1D #1D6666

analogous

#661D41 #661D1D #66411D

triadic

#661D1D #1D661D #1D1D66

tetradic

#661D1D #41661D #1D6666 #411D66

square

#661D1D #41661D #1D6666 #411D66

split-complementary

#661D1D #1D6641 #1D4166

monochromatic

#180707 #360F0F #661D1D #962B2B #C53838

Accessibility & contrast

On white

11.94

#661D1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#661D1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661D1D

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661D1D	#FFFFFF	#000000	##FFFFFF
##661D1D	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#312D1C

Deuteranopia (green-blind)

#433D1B

Tritanopia (blue-blind)

#71091E

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #661d1d;
/* rgb */ color: rgb(102, 29, 29);
/* oklch */ color: oklch(34.9% 0.105 24.4);

Tailwind

colors: {
  custom: {
    50: '#975e59',
    500: '#661d1d',
    950: '#000000',
  },
}

SCSS

$custom: #661d1d;
$custom-light: #975e59;
$custom-dark: #000000;

JSON

{
  "hex": "#661d1d",
  "rgb": {
    "r": 102,
    "g": 29,
    "b": 29
  },
  "hsl": {
    "h": 0,
    "s": 55.725,
    "l": 25.686
  },
  "oklch": {
    "l": 0.34857,
    "c": 0.10488,
    "h": 24.4
  },
  "luminance": 0.03792
}

Semantic roles & 50–950 ramp

primary

#661D1D

secondary

#449B9B

accent

#DFDF49

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0503

muted

#7E7978

Preview Lab

Preview with #661D1D

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

Preview Lab → · Contrast checker → · Palette generator →