#643F34#643F34

#643F34 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.8% C 0.055 H 37.3°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#643F34
RGB	rgb(100, 63, 52)
HSL	hsl(14, 32%, 30%)
HSV	hsv(14, 48%, 39%)
CMYK	cmyk(0%, 37%, 48%, 60.8%)
CIE-LAB	lab(30.67, 14.74, 13.42)
CIE-LCH	lch(30.67, 19.93, 42.31°)
OKLab	oklab(40.79% 0.0441 0.0336)
OKLCH	oklch(40.79% 0.055 37.3)
XYZ	xyz(7.6533, 6.5129, 4.1022)
Luminance	0.0651 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F34 #345964

analogous

#643441 #643F34 #645734

triadic

#643F34 #34643F #3F3464

tetradic

#643F34 #416434 #345964 #573464

square

#643F34 #416434 #345964 #573464

split-complementary

#643F34 #346457 #344164

monochromatic

#140D0A #3C261F #643F34 #8C5849 #AE7564

Accessibility & contrast

On white

9.12

#643F34 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#643F34 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F34

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F34	#FFFFFF	#000000	##FFFFFF
##643F34	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#484433

Deuteranopia (green-blind)

#514B34

Tritanopia (blue-blind)

#6C393C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643f34;
/* rgb */ color: rgb(100, 63, 52);
/* oklch */ color: oklch(40.8% 0.055 37.3);

Tailwind

colors: {
  custom: {
    50: '#92746b',
    500: '#643f34',
    950: '#000000',
  },
}

SCSS

$custom: #643f34;
$custom-light: #92746b;
$custom-dark: #000000;

JSON

{
  "hex": "#643f34",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 52
  },
  "hsl": {
    "h": 13.75,
    "s": 31.579,
    "l": 29.804
  },
  "oklch": {
    "l": 0.40789,
    "c": 0.05539,
    "h": 37.3
  },
  "luminance": 0.06512
}

Semantic roles & 50–950 ramp

primary

#643F34

secondary

#5F8895

accent

#B0C860

background

#F9F7F6

surface

#F1EDEB

border

#CBC8C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643F34

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

Preview Lab → · Contrast checker → · Palette generator →