#643D3D#643D3D

#643D3D is a dark, muted red. Relative luminance 0.064; OKLCH L 40.6% C 0.055 H 19.7°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#643D3D
RGB	rgb(100, 61, 61)
HSL	hsl(0, 24%, 32%)
HSV	hsv(0, 39%, 39%)
CMYK	cmyk(0%, 39%, 39%, 60.8%)
CIE-LAB	lab(30.36, 17.14, 7.20)
CIE-LCH	lch(30.36, 18.59, 22.79°)
OKLab	oklab(40.62% 0.0519 0.0186)
OKLCH	oklch(40.62% 0.055 19.7)
XYZ	xyz(7.7669, 6.3843, 5.2372)
Luminance	0.0638 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D3D #3D6464

analogous

#643D51 #643D3D #64513D

triadic

#643D3D #3D643D #3D3D64

tetradic

#643D3D #51643D #3D6464 #513D64

square

#643D3D #51643D #3D6464 #513D64

split-complementary

#643D3D #3D6451 #3D5164

monochromatic

#180F0F #3E2626 #643D3D #8A5454 #A97272

Accessibility & contrast

On white

9.22

#643D3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#643D3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D3D

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D3D	#FFFFFF	#000000	##FFFFFF
##643D3D	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45433D

Deuteranopia (green-blind)

#4E4A3C

Tritanopia (blue-blind)

#6B393D

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643d3d;
/* rgb */ color: rgb(100, 61, 61);
/* oklch */ color: oklch(40.6% 0.055 19.7);

Tailwind

colors: {
  custom: {
    50: '#927372',
    500: '#643d3d',
    950: '#000000',
  },
}

SCSS

$custom: #643d3d;
$custom-light: #927372;
$custom-dark: #000000;

JSON

{
  "hex": "#643d3d",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 61
  },
  "hsl": {
    "h": 0,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.40621,
    "c": 0.05517,
    "h": 19.7
  },
  "luminance": 0.06384
}

Semantic roles & 50–950 ramp

primary

#643D3D

secondary

#699494

accent

#C1C167

background

#F9F7F6

surface

#F1EDEC

border

#CBC8C7

text

#0D0808

muted

#7E7B7B

Preview Lab

Preview with #643D3D

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

Preview Lab → · Contrast checker → · Palette generator →