#663D33#663D33

#663D33 is a dark, moderate red. Relative luminance 0.064; OKLCH L 40.6% C 0.061 H 34.5°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#663D33
RGB	rgb(102, 61, 51)
HSL	hsl(12, 33%, 30%)
HSV	hsv(12, 50%, 40%)
CMYK	cmyk(0%, 40.2%, 50%, 60%)
CIE-LAB	lab(30.40, 16.76, 13.75)
CIE-LCH	lch(30.40, 21.68, 39.36°)
OKLab	oklab(40.64% 0.05 0.0343)
OKLCH	oklch(40.64% 0.061 34.5)
XYZ	xyz(7.7462, 6.4019, 3.9591)
Luminance	0.0640 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663D33 #335C66

analogous

#663342 #663D33 #665733

triadic

#663D33 #33663D #3D3366

tetradic

#663D33 #426633 #335C66 #573366

square

#663D33 #426633 #335C66 #573366

split-complementary

#663D33 #336657 #334266

monochromatic

#140C0A #3D251F #663D33 #8F5547 #B17263

Accessibility & contrast

On white

9.21

#663D33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#663D33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663D33

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663D33	#FFFFFF	#000000	##FFFFFF
##663D33	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#474232

Deuteranopia (green-blind)

#514B33

Tritanopia (blue-blind)

#6E373A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #663d33;
/* rgb */ color: rgb(102, 61, 51);
/* oklch */ color: oklch(40.6% 0.061 34.5);

Tailwind

colors: {
  custom: {
    50: '#94736a',
    500: '#663d33',
    950: '#000000',
  },
}

SCSS

$custom: #663d33;
$custom-light: #94736a;
$custom-dark: #000000;

JSON

{
  "hex": "#663d33",
  "rgb": {
    "r": 102,
    "g": 61,
    "b": 51
  },
  "hsl": {
    "h": 11.765,
    "s": 33.333,
    "l": 30
  },
  "oklch": {
    "l": 0.40637,
    "c": 0.0606,
    "h": 34.5
  },
  "luminance": 0.06401
}

Semantic roles & 50–950 ramp

primary

#663D33

secondary

#5E8C97

accent

#B4C95E

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #663D33

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

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