#643F36#643F36

#643F36 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.8% C 0.054 H 34.3°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#643F36
RGB	rgb(100, 63, 54)
HSL	hsl(12, 30%, 30%)
HSV	hsv(12, 46%, 39%)
CMYK	cmyk(0%, 37%, 46%, 60.8%)
CIE-LAB	lab(30.72, 14.98, 12.20)
CIE-LCH	lch(30.72, 19.32, 39.16°)
OKLab	oklab(40.84% 0.045 0.0307)
OKLCH	oklch(40.84% 0.054 34.3)
XYZ	xyz(7.6993, 6.5313, 4.3445)
Luminance	0.0653 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F36 #365B64

analogous

#643644 #643F36 #645636

triadic

#643F36 #36643F #3F3664

tetradic

#643F36 #446436 #365B64 #563664

square

#643F36 #446436 #365B64 #563664

split-complementary

#643F36 #366456 #364464

monochromatic

#150D0B #3C2621 #643F36 #8C584B #AD7567

Accessibility & contrast

On white

9.11

#643F36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#643F36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F36

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F36	#FFFFFF	#000000	##FFFFFF
##643F36	1.00	9.11	2.31	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#484435

Deuteranopia (green-blind)

#504B36

Tritanopia (blue-blind)

#6C3A3D

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643f36;
/* rgb */ color: rgb(100, 63, 54);
/* oklch */ color: oklch(40.8% 0.054 34.3);

Tailwind

colors: {
  custom: {
    50: '#92746d',
    500: '#643f36',
    950: '#000000',
  },
}

SCSS

$custom: #643f36;
$custom-light: #92746d;
$custom-dark: #000000;

JSON

{
  "hex": "#643f36",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 54
  },
  "hsl": {
    "h": 11.739,
    "s": 29.87,
    "l": 30.196
  },
  "oklch": {
    "l": 0.40837,
    "c": 0.05448,
    "h": 34.3
  },
  "luminance": 0.06531
}

Semantic roles & 50–950 ramp

primary

#643F36

secondary

#618B95

accent

#B2C662

background

#F9F7F6

surface

#F1EDEB

border

#CBC8C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643F36

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

Preview Lab → · Contrast checker → · Palette generator →