#643D45#643D45

#643D45 is a dark, muted red. Relative luminance 0.065; OKLCH L 40.9% C 0.056 H 6.5°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#643D45
RGB	rgb(100, 61, 69)
HSL	hsl(348, 24%, 32%)
HSV	hsv(348, 39%, 39%)
CMYK	cmyk(0%, 39%, 31%, 60.8%)
CIE-LAB	lab(30.59, 18.31, 2.32)
CIE-LCH	lch(30.59, 18.46, 7.23°)
OKLab	oklab(40.87% 0.0555 0.0063)
OKLCH	oklch(40.87% 0.056 6.5)
XYZ	xyz(7.9987, 6.4770, 6.4580)
Luminance	0.0648 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643D45 #3D645C

analogous

#643D59 #643D45 #64493D

triadic

#643D45 #45643D #3D4564

tetradic

#643D45 #59643D #3D645C #493D64

square

#643D45 #59643D #3D645C #493D64

split-complementary

#643D45 #3D6449 #3D5964

monochromatic

#180F11 #3E262B #643D45 #8A545F #A9727E

Accessibility & contrast

On white

9.15

#643D45 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#643D45 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643D45

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643D45	#FFFFFF	#000000	##FFFFFF
##643D45	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#434445

Deuteranopia (green-blind)

#4D4B44

Tritanopia (blue-blind)

#6B3A40

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #643d45;
/* rgb */ color: rgb(100, 61, 69);
/* oklch */ color: oklch(40.9% 0.056 6.5);

Tailwind

colors: {
  custom: {
    50: '#917378',
    500: '#643d45',
    950: '#000000',
  },
}

SCSS

$custom: #643d45;
$custom-light: #917378;
$custom-dark: #000000;

JSON

{
  "hex": "#643d45",
  "rgb": {
    "r": 100,
    "g": 61,
    "b": 69
  },
  "hsl": {
    "h": 347.692,
    "s": 24.224,
    "l": 31.569
  },
  "oklch": {
    "l": 0.40866,
    "c": 0.05582,
    "h": 6.5
  },
  "luminance": 0.06476
}

Semantic roles & 50–950 ramp

primary

#643D45

secondary

#69948B

accent

#C1AE67

background

#F9F7F7

surface

#F1EDED

border

#CBC8C8

text

#0D0809

muted

#7E7B7B

Preview Lab

Preview with #643D45

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

Preview Lab → · Contrast checker → · Palette generator →