#663333#663333

#663333 is a dark, moderate red. Relative luminance 0.054; OKLCH L 38.7% C 0.073 H 21.0°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#663333
RGB	rgb(102, 51, 51)
HSL	hsl(0, 33%, 30%)
HSV	hsv(0, 50%, 40%)
CMYK	cmyk(0%, 50%, 50%, 60%)
CIE-LAB	lab(27.93, 22.80, 10.40)
CIE-LCH	lch(27.93, 25.06, 24.53°)
OKLab	oklab(38.75% 0.0685 0.0263)
OKLCH	oklch(38.75% 0.073 21)
XYZ	xyz(7.2613, 5.4322, 3.7974)
Luminance	0.0543 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663333 #336666

analogous

#66334D #663333 #664D33

triadic

#663333 #336633 #333366

tetradic

#663333 #4D6633 #336666 #4C3366

square

#663333 #4D6633 #336666 #4C3366

split-complementary

#663333 #33664D #334C66

monochromatic

#140A0A #3D1F1F #663333 #8F4747 #B16363

Accessibility & contrast

On white

10.07

#663333 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#663333 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663333

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663333	#FFFFFF	#000000	##FFFFFF
##663333	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E3C33

Deuteranopia (green-blind)

#4B4632

Tritanopia (blue-blind)

#6F2C33

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #663333;
/* rgb */ color: rgb(102, 51, 51);
/* oklch */ color: oklch(38.7% 0.073 21.0);

Tailwind

colors: {
  custom: {
    50: '#946c6a',
    500: '#663333',
    950: '#000000',
  },
}

SCSS

$custom: #663333;
$custom-light: #946c6a;
$custom-dark: #000000;

JSON

{
  "hex": "#663333",
  "rgb": {
    "r": 102,
    "g": 51,
    "b": 51
  },
  "hsl": {
    "h": 0,
    "s": 33.333,
    "l": 30
  },
  "oklch": {
    "l": 0.38745,
    "c": 0.07335,
    "h": 21
  },
  "luminance": 0.05431
}

Semantic roles & 50–950 ramp

primary

#663333

secondary

#5E9797

accent

#C9C95E

background

#F9F6F6

surface

#F2EBEB

border

#CCC6C6

text

#0D0706

muted

#7E7A7A

Preview Lab

Preview with #663333

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

Preview Lab → · Contrast checker → · Palette generator →