#661B1F#661B1F

#661B1F is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.6% C 0.107 H 21.8°. Best body text is #FFFFFF at 12.06:1 contrast (WCAG AA passes).

Color values

HEX	#661B1F
RGB	rgb(102, 27, 31)
HSL	hsl(357, 58%, 25%)
HSV	hsv(357, 74%, 40%)
CMYK	cmyk(0%, 73.5%, 69.6%, 60%)
CIE-LAB	lab(22.68, 33.66, 16.81)
CIE-LCH	lch(22.68, 37.62, 26.54°)
OKLab	oklab(34.65% 0.0992 0.0398)
OKLCH	oklch(34.65% 0.107 21.8)
XYZ	xyz(6.1194, 3.7085, 1.6896)
Luminance	0.0371 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661B1F #1B6662

analogous

#661B44 #661B1F #663C1B

triadic

#661B1F #1F661B #1B1F66

tetradic

#661B1F #44661B #1B6662 #3C1B66

square

#661B1F #44661B #1B6662 #3C1B66

split-complementary

#661B1F #1B663C #1B4466

monochromatic

#180607 #360E10 #661B1F #96282E #C7353C

Accessibility & contrast

On white

12.06

#661B1F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#661B1F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661B1F

12.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661B1F	#FFFFFF	#000000	##FFFFFF
##661B1F	1.00	12.06	1.74	12.06
#FFFFFF	12.06	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F2C1F

Deuteranopia (green-blind)

#423C1D

Tritanopia (blue-blind)

#70061D

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #661b1f;
/* rgb */ color: rgb(102, 27, 31);
/* oklch */ color: oklch(34.6% 0.107 21.8);

Tailwind

colors: {
  custom: {
    50: '#975d5a',
    500: '#661b1f',
    950: '#000000',
  },
}

SCSS

$custom: #661b1f;
$custom-light: #975d5a;
$custom-dark: #000000;

JSON

{
  "hex": "#661b1f",
  "rgb": {
    "r": 102,
    "g": 27,
    "b": 31
  },
  "hsl": {
    "h": 356.8,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.3465,
    "c": 0.1069,
    "h": 21.8
  },
  "luminance": 0.03708
}

Semantic roles & 50–950 ramp

primary

#661B1F

secondary

#419B97

accent

#E1D946

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #661B1F

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

Preview Lab → · Contrast checker → · Palette generator →