#661B18#661B18

#661B18 is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.5% C 0.108 H 26.7°. Best body text is #FFFFFF at 12.10:1 contrast (WCAG AA passes).

Color values

HEX	#661B18
RGB	rgb(102, 27, 24)
HSL	hsl(2, 62%, 25%)
HSV	hsv(2, 76%, 40%)
CMYK	cmyk(0%, 73.5%, 76.5%, 60%)
CIE-LAB	lab(22.57, 33.25, 21.31)
CIE-LCH	lch(22.57, 39.50, 32.66°)
OKLab	oklab(34.53% 0.0963 0.0485)
OKLCH	oklch(34.53% 0.108 26.7)
XYZ	xyz(6.0370, 3.6755, 1.2555)
Luminance	0.0367 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661B18 #186366

analogous

#66183C #661B18 #664218

triadic

#661B18 #18661B #1B1866

tetradic

#661B18 #3C6618 #186366 #421866

square

#661B18 #3C6618 #186366 #421866

split-complementary

#661B18 #186642 #183C66

monochromatic

#190706 #340E0C #661B18 #982824 #C9352F

Accessibility & contrast

On white

12.10

#661B18 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#661B18 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661B18

12.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661B18	#FFFFFF	#000000	##FFFFFF
##661B18	1.00	12.10	1.74	12.10
#FFFFFF	12.10	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302C17

Deuteranopia (green-blind)

#433C15

Tritanopia (blue-blind)

#71041B

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #661b18;
/* rgb */ color: rgb(102, 27, 24);
/* oklch */ color: oklch(34.5% 0.108 26.7);

Tailwind

colors: {
  custom: {
    50: '#985d55',
    500: '#661b18',
    950: '#000000',
  },
}

SCSS

$custom: #661b18;
$custom-light: #985d55;
$custom-dark: #000000;

JSON

{
  "hex": "#661b18",
  "rgb": {
    "r": 102,
    "g": 27,
    "b": 24
  },
  "hsl": {
    "h": 2.308,
    "s": 61.905,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34527,
    "c": 0.10783,
    "h": 26.7
  },
  "luminance": 0.03675
}

Semantic roles & 50–950 ramp

primary

#661B18

secondary

#3E989C

accent

#DFE543

background

#FAF5F4

surface

#F3E9E7

border

#CDC5C3

text

#0F0403

muted

#7F7978

Preview Lab

Preview with #661B18

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

Preview Lab → · Contrast checker → · Palette generator →