#643B34#643B34

#643B34 is a dark, muted red. Relative luminance 0.061; OKLCH L 40.0% C 0.060 H 30.4°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#643B34
RGB	rgb(100, 59, 52)
HSL	hsl(9, 32%, 30%)
HSV	hsv(9, 48%, 39%)
CMYK	cmyk(0%, 41%, 48%, 60.8%)
CIE-LAB	lab(29.63, 17.21, 12.01)
CIE-LCH	lch(29.63, 20.99, 34.91°)
OKLab	oklab(39.99% 0.0516 0.0302)
OKLCH	oklch(39.99% 0.06 30.4)
XYZ	xyz(7.4397, 6.0858, 4.0310)
Luminance	0.0609 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B34 #345D64

analogous

#643445 #643B34 #645334

triadic

#643B34 #34643B #3B3464

tetradic

#643B34 #456434 #345D64 #533464

square

#643B34 #456434 #345D64 #533464

split-complementary

#643B34 #346453 #344564

monochromatic

#140C0A #3C231F #643B34 #8C5349 #AE6F64

Accessibility & contrast

On white

9.47

#643B34 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#643B34 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B34

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B34	#FFFFFF	#000000	##FFFFFF
##643B34	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444133

Deuteranopia (green-blind)

#4E4933

Tritanopia (blue-blind)

#6C3539

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643b34;
/* rgb */ color: rgb(100, 59, 52);
/* oklch */ color: oklch(40.0% 0.060 30.4);

Tailwind

colors: {
  custom: {
    50: '#92716b',
    500: '#643b34',
    950: '#000000',
  },
}

SCSS

$custom: #643b34;
$custom-light: #92716b;
$custom-dark: #000000;

JSON

{
  "hex": "#643b34",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 52
  },
  "hsl": {
    "h": 8.75,
    "s": 31.579,
    "l": 29.804
  },
  "oklch": {
    "l": 0.39986,
    "c": 0.05976,
    "h": 30.4
  },
  "luminance": 0.06085
}

Semantic roles & 50–950 ramp

primary

#643B34

secondary

#5F8D95

accent

#B9C860

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0706

muted

#7E7A7A

Preview Lab

Preview with #643B34

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

Preview Lab → · Contrast checker → · Palette generator →