#643A2D#643A2D

#643A2D is a dark, moderate red. Relative luminance 0.059; OKLCH L 39.6% C 0.064 H 38.0°. Best body text is #FFFFFF at 9.61:1 contrast (WCAG AA passes).

Color values

HEX	#643A2D
RGB	rgb(100, 58, 45)
HSL	hsl(14, 38%, 28%)
HSV	hsv(14, 55%, 39%)
CMYK	cmyk(0%, 42%, 55%, 60.8%)
CIE-LAB	lab(29.22, 17.05, 15.97)
CIE-LCH	lch(29.22, 23.36, 43.13°)
OKLab	oklab(39.63% 0.0502 0.0392)
OKLCH	oklch(39.63% 0.064 38)
XYZ	xyz(7.2427, 5.9256, 3.2444)
Luminance	0.0592 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A2D #2D5764

analogous

#642D3B #643A2D #64552D

triadic

#643A2D #2D643A #3A2D64

tetradic

#643A2D #3B642D #2D5764 #552D64

square

#643A2D #3B642D #2D5764 #552D64

split-complementary

#643A2D #2D6455 #2D3B64

monochromatic

#150C09 #3A221A #643A2D #8E5240 #B46D58

Accessibility & contrast

On white

9.61

#643A2D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#643A2D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A2D

9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A2D	#FFFFFF	#000000	##FFFFFF
##643A2D	1.00	9.61	2.19	9.61
#FFFFFF	9.61	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#443F2C

Deuteranopia (green-blind)

#4F482D

Tritanopia (blue-blind)

#6D3337

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #643a2d;
/* rgb */ color: rgb(100, 58, 45);
/* oklch */ color: oklch(39.6% 0.064 38.0);

Tailwind

colors: {
  custom: {
    50: '#937066',
    500: '#643a2d',
    950: '#000000',
  },
}

SCSS

$custom: #643a2d;
$custom-light: #937066;
$custom-dark: #000000;

JSON

{
  "hex": "#643a2d",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 45
  },
  "hsl": {
    "h": 14.182,
    "s": 37.931,
    "l": 28.431
  },
  "oklch": {
    "l": 0.39628,
    "c": 0.06372,
    "h": 38
  },
  "luminance": 0.05925
}

Semantic roles & 50–950 ramp

primary

#643A2D

secondary

#578796

accent

#B2CE5A

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0705

muted

#7E7A7A

Preview Lab

Preview with #643A2D

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

Preview Lab → · Contrast checker → · Palette generator →