#643C3E#643C3E

#643C3E is a dark, muted red. Relative luminance 0.063; OKLCH L 40.5% C 0.057 H 16.6°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#643C3E
RGB	rgb(100, 60, 62)
HSL	hsl(357, 25%, 31%)
HSV	hsv(357, 40%, 39%)
CMYK	cmyk(0%, 40%, 38%, 60.8%)
CIE-LAB	lab(30.13, 17.89, 6.22)
CIE-LCH	lch(30.13, 18.94, 19.18°)
OKLab	oklab(40.45% 0.0542 0.0162)
OKLCH	oklch(40.45% 0.057 16.6)
XYZ	xyz(7.7412, 6.2894, 5.3628)
Luminance	0.0629 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C3E #3C6462

analogous

#643C52 #643C3E #644E3C

triadic

#643C3E #3E643C #3C3E64

tetradic

#643C3E #52643C #3C6462 #4E3C64

square

#643C3E #52643C #3C6462 #4E3C64

split-complementary

#643C3E #3C644E #3C5264

monochromatic

#180E0F #3E2526 #643C3E #8A5356 #AA7174

Accessibility & contrast

On white

9.30

#643C3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#643C3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C3E

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C3E	#FFFFFF	#000000	##FFFFFF
##643C3E	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#44423E

Deuteranopia (green-blind)

#4D4A3D

Tritanopia (blue-blind)

#6B383D

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643c3e;
/* rgb */ color: rgb(100, 60, 62);
/* oklch */ color: oklch(40.5% 0.057 16.6);

Tailwind

colors: {
  custom: {
    50: '#927273',
    500: '#643c3e',
    950: '#000000',
  },
}

SCSS

$custom: #643c3e;
$custom-light: #927273;
$custom-dark: #000000;

JSON

{
  "hex": "#643c3e",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 62
  },
  "hsl": {
    "h": 357,
    "s": 25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.40453,
    "c": 0.05661,
    "h": 16.6
  },
  "luminance": 0.06289
}

Semantic roles & 50–950 ramp

primary

#643C3E

secondary

#689492

accent

#C1BD66

background

#F9F6F6

surface

#F1ECEC

border

#CBC7C7

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643C3E

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

Preview Lab → · Contrast checker → · Palette generator →