#643D31#643D31

#643D31 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.3% C 0.059 H 37.9°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#643D31
RGB	rgb(100, 61, 49)
HSL	hsl(14, 34%, 29%)
HSV	hsv(14, 51%, 39%)
CMYK	cmyk(0%, 39%, 51%, 60.8%)
CIE-LAB	lab(30.08, 15.63, 14.55)
CIE-LCH	lch(30.08, 21.35, 42.94°)
OKLab	oklab(40.31% 0.0464 0.0361)
OKLCH	oklch(40.31% 0.059 37.9)
XYZ	xyz(7.4791, 6.2692, 3.7213)
Luminance	0.0627 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D31 #315864

analogous

#64313F #643D31 #645731

triadic

#643D31 #31643D #3D3164

tetradic

#643D31 #3F6431 #315864 #573164

square

#643D31 #3F6431 #315864 #573164

split-complementary

#643D31 #316457 #313F64

monochromatic

#150D0A #3B241D #643D31 #8D5645 #B1725F

Accessibility & contrast

On white

9.32

#643D31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#643D31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D31

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D31	#FFFFFF	#000000	##FFFFFF
##643D31	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#474230

Deuteranopia (green-blind)

#504A31

Tritanopia (blue-blind)

#6C373A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643d31;
/* rgb */ color: rgb(100, 61, 49);
/* oklch */ color: oklch(40.3% 0.059 37.9);

Tailwind

colors: {
  custom: {
    50: '#927369',
    500: '#643d31',
    950: '#000000',
  },
}

SCSS

$custom: #643d31;
$custom-light: #927369;
$custom-dark: #000000;

JSON

{
  "hex": "#643d31",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 49
  },
  "hsl": {
    "h": 14.118,
    "s": 34.228,
    "l": 29.216
  },
  "oklch": {
    "l": 0.40314,
    "c": 0.05882,
    "h": 37.9
  },
  "luminance": 0.06269
}

Semantic roles & 50–950 ramp

primary

#643D31

secondary

#5C8895

accent

#B1CA5D

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643D31

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

Preview Lab → · Contrast checker → · Palette generator →