#643E41#643E41

#643E41 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.9% C 0.054 H 14.5°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#643E41
RGB	rgb(100, 62, 65)
HSL	hsl(355, 23%, 32%)
HSV	hsv(355, 38%, 39%)
CMYK	cmyk(0%, 38%, 35%, 60.8%)
CIE-LAB	lab(30.73, 17.09, 5.12)
CIE-LCH	lch(30.73, 17.84, 16.69°)
OKLab	oklab(40.94% 0.0519 0.0135)
OKLCH	oklch(40.94% 0.054 14.5)
XYZ	xyz(7.9326, 6.5368, 5.8439)
Luminance	0.0654 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643E41 #3E6461

analogous

#643E54 #643E41 #644E3E

triadic

#643E41 #41643E #3E4164

tetradic

#643E41 #54643E #3E6461 #4E3E64

square

#643E41 #54643E #3E6461 #4E3E64

split-complementary

#643E41 #3E644E #3E5464

monochromatic

#180F10 #3E2728 #643E41 #8A555A #A97478

Accessibility & contrast

On white

9.10

#643E41 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#643E41 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643E41

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643E41	#FFFFFF	#000000	##FFFFFF
##643E41	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454441

Deuteranopia (green-blind)

#4E4B40

Tritanopia (blue-blind)

#6B3A3F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643e41;
/* rgb */ color: rgb(100, 62, 65);
/* oklch */ color: oklch(40.9% 0.054 14.5);

Tailwind

colors: {
  custom: {
    50: '#917375',
    500: '#643e41',
    950: '#000000',
  },
}

SCSS

$custom: #643e41;
$custom-light: #917375;
$custom-dark: #000000;

JSON

{
  "hex": "#643e41",
  "rgb": {
    "r": 100,
    "g": 62,
    "b": 65
  },
  "hsl": {
    "h": 355.263,
    "s": 23.457,
    "l": 31.765
  },
  "oklch": {
    "l": 0.40938,
    "c": 0.05358,
    "h": 14.5
  },
  "luminance": 0.06536
}

Semantic roles & 50–950 ramp

primary

#643E41

secondary

#6A9490

accent

#C0B968

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643E41

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

Preview Lab → · Contrast checker → · Palette generator →