#643B45#643B45

#643B45 is a dark, muted red. Relative luminance 0.063; OKLCH L 40.5% C 0.059 H 4.3°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#643B45
RGB	rgb(100, 59, 69)
HSL	hsl(345, 26%, 31%)
HSV	hsv(345, 41%, 39%)
CMYK	cmyk(0%, 41%, 31%, 60.8%)
CIE-LAB	lab(30.08, 19.54, 1.59)
CIE-LCH	lch(30.08, 19.60, 4.65°)
OKLab	oklab(40.48% 0.0592 0.0044)
OKLCH	oklch(40.48% 0.059 4.3)
XYZ	xyz(7.8939, 6.2675, 6.4231)
Luminance	0.0627 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B45 #3B645A

analogous

#643B59 #643B45 #64453B

triadic

#643B45 #45643B #3B4564

tetradic

#643B45 #59643B #3B645A #453B64

square

#643B45 #59643B #3B645A #453B64

split-complementary

#643B45 #3B6445 #3B5964

monochromatic

#170E10 #3E242A #643B45 #8A5260 #AA6F7E

Accessibility & contrast

On white

9.32

#643B45 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#643B45 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B45

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B45	#FFFFFF	#000000	##FFFFFF
##643B45	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#414245

Deuteranopia (green-blind)

#4B4A44

Tritanopia (blue-blind)

#6B383E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643b45;
/* rgb */ color: rgb(100, 59, 69);
/* oklch */ color: oklch(40.5% 0.059 4.3);

Tailwind

colors: {
  custom: {
    50: '#917178',
    500: '#643b45',
    950: '#000000',
  },
}

SCSS

$custom: #643b45;
$custom-light: #917178;
$custom-dark: #000000;

JSON

{
  "hex": "#643b45",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 69
  },
  "hsl": {
    "h": 345.366,
    "s": 25.786,
    "l": 31.176
  },
  "oklch": {
    "l": 0.40478,
    "c": 0.05931,
    "h": 4.3
  },
  "luminance": 0.06267
}

Semantic roles & 50–950 ramp

primary

#643B45

secondary

#679489

accent

#C2AC66

background

#F9F6F7

surface

#F1ECED

border

#CBC7C8

text

#0D0809

muted

#7E7B7B

Preview Lab

Preview with #643B45

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

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