#643D34#643D34

#643D34 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.4% C 0.057 H 33.7°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#643D34
RGB	rgb(100, 61, 52)
HSL	hsl(11, 32%, 30%)
HSV	hsv(11, 48%, 39%)
CMYK	cmyk(0%, 39%, 48%, 60.8%)
CIE-LAB	lab(30.15, 15.98, 12.71)
CIE-LCH	lch(30.15, 20.42, 38.51°)
OKLab	oklab(40.38% 0.0478 0.0319)
OKLCH	oklch(40.38% 0.057 33.7)
XYZ	xyz(7.5445, 6.2954, 4.0659)
Luminance	0.0630 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D34 #345B64

analogous

#643443 #643D34 #645534

triadic

#643D34 #34643D #3D3464

tetradic

#643D34 #436434 #345B64 #553464

square

#643D34 #436434 #345B64 #553464

split-complementary

#643D34 #346455 #344364

monochromatic

#140C0A #3C241F #643D34 #8C5649 #AE7264

Accessibility & contrast

On white

9.30

#643D34 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#643D34 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D34

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D34	#FFFFFF	#000000	##FFFFFF
##643D34	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)

#464233

Deuteranopia (green-blind)

#4F4A34

Tritanopia (blue-blind)

#6C373B

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643d34;
/* rgb */ color: rgb(100, 61, 52);
/* oklch */ color: oklch(40.4% 0.057 33.7);

Tailwind

colors: {
  custom: {
    50: '#92736b',
    500: '#643d34',
    950: '#000000',
  },
}

SCSS

$custom: #643d34;
$custom-light: #92736b;
$custom-dark: #000000;

JSON

{
  "hex": "#643d34",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 52
  },
  "hsl": {
    "h": 11.25,
    "s": 31.579,
    "l": 29.804
  },
  "oklch": {
    "l": 0.40384,
    "c": 0.05747,
    "h": 33.7
  },
  "luminance": 0.06295
}

Semantic roles & 50–950 ramp

primary

#643D34

secondary

#5F8B95

accent

#B4C860

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #643D34

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

Preview Lab → · Contrast checker → · Palette generator →