#643C2F#643C2F

#643C2F is a dark, moderate red. Relative luminance 0.061; OKLCH L 40.1% C 0.061 H 38.8°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#643C2F
RGB	rgb(100, 60, 47)
HSL	hsl(15, 36%, 29%)
HSV	hsv(15, 53%, 39%)
CMYK	cmyk(0%, 40%, 53%, 60.8%)
CIE-LAB	lab(29.78, 16.03, 15.42)
CIE-LCH	lch(29.78, 22.24, 43.90°)
OKLab	oklab(40.07% 0.0474 0.0381)
OKLCH	oklch(40.07% 0.061 38.8)
XYZ	xyz(7.3849, 6.1469, 3.4863)
Luminance	0.0615 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C2F #2F5764

analogous

#642F3D #643C2F #64572F

triadic

#643C2F #2F643C #3C2F64

tetradic

#643C2F #3D642F #2F5764 #572F64

square

#643C2F #3D642F #2F5764 #572F64

split-complementary

#643C2F #2F6457 #2F3D64

monochromatic

#150C0A #3A231B #643C2F #8E5543 #B2715B

Accessibility & contrast

On white

9.42

#643C2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#643C2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C2F

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C2F	#FFFFFF	#000000	##FFFFFF
##643C2F	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#46412E

Deuteranopia (green-blind)

#50492F

Tritanopia (blue-blind)

#6D3639

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643c2f;
/* rgb */ color: rgb(100, 60, 47);
/* oklch */ color: oklch(40.1% 0.061 38.8);

Tailwind

colors: {
  custom: {
    50: '#927267',
    500: '#643c2f',
    950: '#000000',
  },
}

SCSS

$custom: #643c2f;
$custom-light: #927267;
$custom-dark: #000000;

JSON

{
  "hex": "#643c2f",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 47
  },
  "hsl": {
    "h": 14.717,
    "s": 36.054,
    "l": 28.824
  },
  "oklch": {
    "l": 0.40069,
    "c": 0.06078,
    "h": 38.8
  },
  "luminance": 0.06146
}

Semantic roles & 50–950 ramp

primary

#643C2F

secondary

#598796

accent

#B1CC5C

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643C2F

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

Preview Lab → · Contrast checker → · Palette generator →