#643D46#643D46

#643D46 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.9% C 0.056 H 4.8°. Best body text is #FFFFFF at 9.14:1 contrast (WCAG AA passes).

Color values

HEX	#643D46
RGB	rgb(100, 61, 70)
HSL	hsl(346, 24%, 32%)
HSV	hsv(346, 39%, 39%)
CMYK	cmyk(0%, 39%, 30%, 60.8%)
CIE-LAB	lab(30.62, 18.47, 1.72)
CIE-LCH	lch(30.62, 18.55, 5.31°)
OKLab	oklab(40.9% 0.0559 0.0047)
OKLCH	oklch(40.9% 0.056 4.8)
XYZ	xyz(8.0300, 6.4896, 6.6228)
Luminance	0.0649 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D46 #3D645B

analogous

#643D5A #643D46 #64483D

triadic

#643D46 #46643D #3D4664

tetradic

#643D46 #5A643D #3D645B #483D64

square

#643D46 #5A643D #3D645B #483D64

split-complementary

#643D46 #3D6448 #3D5A64

monochromatic

#180F11 #3E262B #643D46 #8A5461 #A9727F

Accessibility & contrast

On white

9.14

#643D46 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#643D46 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D46

9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D46	#FFFFFF	#000000	##FFFFFF
##643D46	1.00	9.14	2.30	9.14
#FFFFFF	9.14	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#434446

Deuteranopia (green-blind)

#4C4B45

Tritanopia (blue-blind)

#6A3A40

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643d46;
/* rgb */ color: rgb(100, 61, 70);
/* oklch */ color: oklch(40.9% 0.056 4.8);

Tailwind

colors: {
  custom: {
    50: '#917379',
    500: '#643d46',
    950: '#000000',
  },
}

SCSS

$custom: #643d46;
$custom-light: #917379;
$custom-dark: #000000;

JSON

{
  "hex": "#643d46",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 70
  },
  "hsl": {
    "h": 346.154,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.40899,
    "c": 0.05609,
    "h": 4.8
  },
  "luminance": 0.06489
}

Semantic roles & 50–950 ramp

primary

#643D46

secondary

#69948A

accent

#C1AC67

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0809

muted

#7E7B7B

Preview Lab

Preview with #643D46

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

Preview Lab → · Contrast checker → · Palette generator →