#643F35#643F35

#643F35 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.8% C 0.055 H 35.8°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#643F35
RGB	rgb(100, 63, 53)
HSL	hsl(13, 31%, 30%)
HSV	hsv(13, 47%, 39%)
CMYK	cmyk(0%, 37%, 47%, 60.8%)
CIE-LAB	lab(30.69, 14.86, 12.81)
CIE-LCH	lch(30.69, 19.62, 40.76°)
OKLab	oklab(40.81% 0.0445 0.0322)
OKLCH	oklch(40.81% 0.055 35.8)
XYZ	xyz(7.6760, 6.5220, 4.2221)
Luminance	0.0652 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F35 #355A64

analogous

#643542 #643F35 #645735

triadic

#643F35 #35643F #3F3564

tetradic

#643F35 #426435 #355A64 #573564

square

#643F35 #426435 #355A64 #573564

split-complementary

#643F35 #356457 #354264

monochromatic

#140D0B #3C2620 #643F35 #8C584A #AE7566

Accessibility & contrast

On white

9.11

#643F35 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#643F35 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F35

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F35	#FFFFFF	#000000	##FFFFFF
##643F35	1.00	9.11	2.30	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#484434

Deuteranopia (green-blind)

#514B35

Tritanopia (blue-blind)

#6C393C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643f35;
/* rgb */ color: rgb(100, 63, 53);
/* oklch */ color: oklch(40.8% 0.055 35.8);

Tailwind

colors: {
  custom: {
    50: '#92746c',
    500: '#643f35',
    950: '#000000',
  },
}

SCSS

$custom: #643f35;
$custom-light: #92746c;
$custom-dark: #000000;

JSON

{
  "hex": "#643f35",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 53
  },
  "hsl": {
    "h": 12.766,
    "s": 30.719,
    "l": 30
  },
  "oklch": {
    "l": 0.40813,
    "c": 0.05492,
    "h": 35.8
  },
  "luminance": 0.06521
}

Semantic roles & 50–950 ramp

primary

#643F35

secondary

#608A95

accent

#B1C761

background

#F9F7F6

surface

#F1EDEB

border

#CBC8C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643F35

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

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