#643B2E#643B2E

#643B2E is a dark, moderate red. Relative luminance 0.060; OKLCH L 39.8% C 0.062 H 38.4°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#643B2E
RGB	rgb(100, 59, 46)
HSL	hsl(14, 37%, 29%)
HSV	hsv(14, 54%, 39%)
CMYK	cmyk(0%, 41%, 54%, 60.8%)
CIE-LAB	lab(29.50, 16.54, 15.69)
CIE-LCH	lch(29.50, 22.80, 43.50°)
OKLab	oklab(39.85% 0.0488 0.0386)
OKLCH	oklch(39.85% 0.062 38.4)
XYZ	xyz(7.3131, 6.0352, 3.3640)
Luminance	0.0604 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B2E #2E5764

analogous

#642E3C #643B2E #64562E

triadic

#643B2E #2E643B #3B2E64

tetradic

#643B2E #3C642E #2E5764 #562E64

square

#643B2E #3C642E #2E5764 #562E64

split-complementary

#643B2E #2E6456 #2E3C64

monochromatic

#150C0A #3A221B #643B2E #8E5441 #B36F5A

Accessibility & contrast

On white

9.52

#643B2E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#643B2E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B2E

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B2E	#FFFFFF	#000000	##FFFFFF
##643B2E	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45402D

Deuteranopia (green-blind)

#4F492E

Tritanopia (blue-blind)

#6D3438

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #643b2e;
/* rgb */ color: rgb(100, 59, 46);
/* oklch */ color: oklch(39.8% 0.062 38.4);

Tailwind

colors: {
  custom: {
    50: '#937166',
    500: '#643b2e',
    950: '#000000',
  },
}

SCSS

$custom: #643b2e;
$custom-light: #937166;
$custom-dark: #000000;

JSON

{
  "hex": "#643b2e",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 46
  },
  "hsl": {
    "h": 14.444,
    "s": 36.986,
    "l": 28.627
  },
  "oklch": {
    "l": 0.39847,
    "c": 0.06225,
    "h": 38.4
  },
  "luminance": 0.06035
}

Semantic roles & 50–950 ramp

primary

#643B2E

secondary

#588796

accent

#B1CD5B

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0706

muted

#7E7A7A

Preview Lab

Preview with #643B2E

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

Preview Lab → · Contrast checker → · Palette generator →