#661D1B#661D1B

#661D1B is a dark, moderate red. Relative luminance 0.038; OKLCH L 34.8% C 0.105 H 25.8°. Best body text is #FFFFFF at 11.95:1 contrast (WCAG AA passes).

Color values

HEX	#661D1B
RGB	rgb(102, 29, 27)
HSL	hsl(2, 58%, 25%)
HSV	hsv(2, 74%, 40%)
CMYK	cmyk(0%, 71.6%, 73.5%, 60%)
CIE-LAB	lab(22.94, 32.52, 19.79)
CIE-LCH	lch(22.94, 38.07, 31.32°)
OKLab	oklab(34.82% 0.0947 0.0458)
OKLCH	oklch(34.82% 0.105 25.8)
XYZ	xyz(6.1173, 3.7835, 1.4449)
Luminance	0.0378 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661D1B #1B6466

analogous

#661B3E #661D1B #66421B

triadic

#661D1B #1B661D #1D1B66

tetradic

#661D1B #3E661B #1B6466 #421B66

square

#661D1B #3E661B #1B6466 #421B66

split-complementary

#661D1B #1B6642 #1B3E66

monochromatic

#180706 #360F0E #661D1B #962B28 #C73935

Accessibility & contrast

On white

11.95

#661D1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#661D1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661D1B

11.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661D1B	#FFFFFF	#000000	##FFFFFF
##661D1B	1.00	11.95	1.76	11.95
#FFFFFF	11.95	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#312D1A

Deuteranopia (green-blind)

#433D19

Tritanopia (blue-blind)

#71091D

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #661d1b;
/* rgb */ color: rgb(102, 29, 27);
/* oklch */ color: oklch(34.8% 0.105 25.8);

Tailwind

colors: {
  custom: {
    50: '#985e57',
    500: '#661d1b',
    950: '#000000',
  },
}

SCSS

$custom: #661d1b;
$custom-light: #985e57;
$custom-dark: #000000;

JSON

{
  "hex": "#661d1b",
  "rgb": {
    "r": 102,
    "g": 29,
    "b": 27
  },
  "hsl": {
    "h": 1.6,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.34822,
    "c": 0.10519,
    "h": 25.8
  },
  "luminance": 0.03783
}

Semantic roles & 50–950 ramp

primary

#661D1B

secondary

#41999B

accent

#DDE146

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0503

muted

#7E7978

Preview Lab

Preview with #661D1B

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

Preview Lab → · Contrast checker → · Palette generator →