#661B1D#661B1D

#661B1D is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.6% C 0.107 H 23.3°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#661B1D
RGB	rgb(102, 27, 29)
HSL	hsl(358, 58%, 25%)
HSV	hsv(358, 74%, 40%)
CMYK	cmyk(0%, 73.5%, 71.6%, 60%)
CIE-LAB	lab(22.65, 33.53, 18.11)
CIE-LCH	lch(22.65, 38.11, 28.37°)
OKLab	oklab(34.61% 0.0984 0.0424)
OKLCH	oklch(34.61% 0.107 23.3)
XYZ	xyz(6.0938, 3.6982, 1.5551)
Luminance	0.0370 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661B1D #1B6664

analogous

#661B42 #661B1D #663E1B

triadic

#661B1D #1D661B #1B1D66

tetradic

#661B1D #42661B #1B6664 #3E1B66

square

#661B1D #42661B #1B6664 #3E1B66

split-complementary

#661B1D #1B663E #1B4266

monochromatic

#180607 #360E0F #661B1D #96282B #C73539

Accessibility & contrast

On white

12.07

#661B1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#661B1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661B1D

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661B1D	#FFFFFF	#000000	##FFFFFF
##661B1D	1.00	12.07	1.74	12.07
#FFFFFF	12.07	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302C1C

Deuteranopia (green-blind)

#433C1B

Tritanopia (blue-blind)

#71051C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #661b1d;
/* rgb */ color: rgb(102, 27, 29);
/* oklch */ color: oklch(34.6% 0.107 23.3);

Tailwind

colors: {
  custom: {
    50: '#985d59',
    500: '#661b1d',
    950: '#000000',
  },
}

SCSS

$custom: #661b1d;
$custom-light: #985d59;
$custom-dark: #000000;

JSON

{
  "hex": "#661b1d",
  "rgb": {
    "r": 102,
    "g": 27,
    "b": 29
  },
  "hsl": {
    "h": 358.4,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.34612,
    "c": 0.10712,
    "h": 23.3
  },
  "luminance": 0.03697
}

Semantic roles & 50–950 ramp

primary

#661B1D

secondary

#419B99

accent

#E1DD46

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #661B1D

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

Preview Lab → · Contrast checker → · Palette generator →