#643C38#643C38

#643C38 is a dark, muted red. Relative luminance 0.062; OKLCH L 40.3% C 0.057 H 26.1°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#643C38
RGB	rgb(100, 60, 56)
HSL	hsl(5, 28%, 31%)
HSV	hsv(5, 44%, 39%)
CMYK	cmyk(0%, 40%, 44%, 60.8%)
CIE-LAB	lab(29.98, 17.09, 9.91)
CIE-LCH	lch(29.98, 19.75, 30.10°)
OKLab	oklab(40.29% 0.0515 0.0252)
OKLCH	oklch(40.29% 0.057 26.1)
XYZ	xyz(7.5856, 6.2272, 4.5431)
Luminance	0.0623 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643C38 #386064

analogous

#64384A #643C38 #645238

triadic

#643C38 #38643C #3C3864

tetradic

#643C38 #4A6438 #386064 #523864

square

#643C38 #4A6438 #386064 #523864

split-complementary

#643C38 #386452 #384A64

monochromatic

#160D0C #3D2422 #643C38 #8B544E #AC706B

Accessibility & contrast

On white

9.35

#643C38 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#643C38 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643C38

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643C38	#FFFFFF	#000000	##FFFFFF
##643C38	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454238

Deuteranopia (green-blind)

#4E4A37

Tritanopia (blue-blind)

#6C373B

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643c38;
/* rgb */ color: rgb(100, 60, 56);
/* oklch */ color: oklch(40.3% 0.057 26.1);

Tailwind

colors: {
  custom: {
    50: '#92726e',
    500: '#643c38',
    950: '#000000',
  },
}

SCSS

$custom: #643c38;
$custom-light: #92726e;
$custom-dark: #000000;

JSON

{
  "hex": "#643c38",
  "rgb": {
    "r": 100,
    "g": 60,
    "b": 56
  },
  "hsl": {
    "h": 5.455,
    "s": 28.205,
    "l": 30.588
  },
  "oklch": {
    "l": 0.40286,
    "c": 0.05737,
    "h": 26.1
  },
  "luminance": 0.06227
}

Semantic roles & 50–950 ramp

primary

#643C38

secondary

#639094

accent

#BCC563

background

#F9F6F6

surface

#F1ECEB

border

#CBC7C6

text

#0D0807

muted

#7E7B7A

Preview Lab

Preview with #643C38

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

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