#663D36#663D36

#663D36 is a dark, muted red. Relative luminance 0.064; OKLCH L 40.7% C 0.059 H 30.3°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#663D36
RGB	rgb(102, 61, 54)
HSL	hsl(9, 31%, 31%)
HSV	hsv(9, 47%, 40%)
CMYK	cmyk(0%, 40.2%, 47.1%, 60%)
CIE-LAB	lab(30.47, 17.11, 11.92)
CIE-LCH	lch(30.47, 20.85, 34.85°)
OKLab	oklab(40.71% 0.0513 0.03)
OKLCH	oklch(40.71% 0.059 30.3)
XYZ	xyz(7.8145, 6.4293, 4.3187)
Luminance	0.0643 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663D36 #365F66

analogous

#663647 #663D36 #665536

triadic

#663D36 #36663D #3D3666

tetradic

#663D36 #476636 #365F66 #553666

square

#663D36 #476636 #365F66 #553666

split-complementary

#663D36 #366655 #364766

monochromatic

#160D0C #3E2521 #663D36 #8E554B #AF7268

Accessibility & contrast

On white

9.19

#663D36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#663D36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663D36

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663D36	#FFFFFF	#000000	##FFFFFF
##663D36	1.00	9.19	2.29	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#464335

Deuteranopia (green-blind)

#504B35

Tritanopia (blue-blind)

#6E373B

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #663d36;
/* rgb */ color: rgb(102, 61, 54);
/* oklch */ color: oklch(40.7% 0.059 30.3);

Tailwind

colors: {
  custom: {
    50: '#94736d',
    500: '#663d36',
    950: '#000000',
  },
}

SCSS

$custom: #663d36;
$custom-light: #94736d;
$custom-dark: #000000;

JSON

{
  "hex": "#663d36",
  "rgb": {
    "r": 102,
    "g": 61,
    "b": 54
  },
  "hsl": {
    "h": 8.75,
    "s": 30.769,
    "l": 30.588
  },
  "oklch": {
    "l": 0.40709,
    "c": 0.05946,
    "h": 30.3
  },
  "luminance": 0.06429
}

Semantic roles & 50–950 ramp

primary

#663D36

secondary

#618F97

accent

#B8C761

background

#F9F7F6

surface

#F2EDEB

border

#CCC8C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #663D36

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

Preview Lab → · Contrast checker → · Palette generator →