#643D36#643D36

#643D36 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.4% C 0.057 H 30.8°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#643D36
RGB	rgb(100, 61, 54)
HSL	hsl(9, 30%, 30%)
HSV	hsv(9, 46%, 39%)
CMYK	cmyk(0%, 39%, 46%, 60.8%)
CIE-LAB	lab(30.19, 16.22, 11.49)
CIE-LCH	lch(30.19, 19.88, 35.31°)
OKLab	oklab(40.43% 0.0487 0.029)
OKLCH	oklch(40.43% 0.057 30.8)
XYZ	xyz(7.5905, 6.3138, 4.3082)
Luminance	0.0631 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D36 #365D64

analogous

#643646 #643D36 #645436

triadic

#643D36 #36643D #3D3664

tetradic

#643D36 #466436 #365D64 #543664

square

#643D36 #466436 #365D64 #543664

split-complementary

#643D36 #366454 #364664

monochromatic

#150D0B #3C2521 #643D36 #8C554B #AD7267

Accessibility & contrast

On white

9.28

#643D36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#643D36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D36

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D36	#FFFFFF	#000000	##FFFFFF
##643D36	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#464235

Deuteranopia (green-blind)

#4F4A35

Tritanopia (blue-blind)

#6C383B

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643d36;
/* rgb */ color: rgb(100, 61, 54);
/* oklch */ color: oklch(40.4% 0.057 30.8);

Tailwind

colors: {
  custom: {
    50: '#92736d',
    500: '#643d36',
    950: '#000000',
  },
}

SCSS

$custom: #643d36;
$custom-light: #92736d;
$custom-dark: #000000;

JSON

{
  "hex": "#643d36",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 54
  },
  "hsl": {
    "h": 9.13,
    "s": 29.87,
    "l": 30.196
  },
  "oklch": {
    "l": 0.40434,
    "c": 0.05672,
    "h": 30.8
  },
  "luminance": 0.06313
}

Semantic roles & 50–950 ramp

primary

#643D36

secondary

#618D95

accent

#B7C662

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643D36

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

Preview Lab → · Contrast checker → · Palette generator →