#643B2F#643B2F

#643B2F is a dark, moderate red. Relative luminance 0.060; OKLCH L 39.9% C 0.062 H 37.1°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#643B2F
RGB	rgb(100, 59, 47)
HSL	hsl(14, 36%, 29%)
HSV	hsv(14, 53%, 39%)
CMYK	cmyk(0%, 41%, 53%, 60.8%)
CIE-LAB	lab(29.52, 16.64, 15.08)
CIE-LCH	lch(29.52, 22.46, 42.18°)
OKLab	oklab(39.87% 0.0493 0.0373)
OKLCH	oklch(39.87% 0.062 37.1)
XYZ	xyz(7.3330, 6.0431, 3.4690)
Luminance	0.0604 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643B2F #2F5864

analogous

#642F3E #643B2F #64562F

triadic

#643B2F #2F643B #3B2F64

tetradic

#643B2F #3E642F #2F5864 #562F64

square

#643B2F #3E642F #2F5864 #562F64

split-complementary

#643B2F #2F6456 #2F3E64

monochromatic

#150C0A #3A221B #643B2F #8E5443 #B26F5B

Accessibility & contrast

On white

9.51

#643B2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#643B2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643B2F

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643B2F	#FFFFFF	#000000	##FFFFFF
##643B2F	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45402E

Deuteranopia (green-blind)

#4F492F

Tritanopia (blue-blind)

#6D3438

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #643b2f;
/* rgb */ color: rgb(100, 59, 47);
/* oklch */ color: oklch(39.9% 0.062 37.1);

Tailwind

colors: {
  custom: {
    50: '#937167',
    500: '#643b2f',
    950: '#000000',
  },
}

SCSS

$custom: #643b2f;
$custom-light: #937167;
$custom-dark: #000000;

JSON

{
  "hex": "#643b2f",
  "rgb": {
    "r": 100,
    "g": 59,
    "b": 47
  },
  "hsl": {
    "h": 13.585,
    "s": 36.054,
    "l": 28.824
  },
  "oklch": {
    "l": 0.39869,
    "c": 0.06178,
    "h": 37.1
  },
  "luminance": 0.06042
}

Semantic roles & 50–950 ramp

primary

#643B2F

secondary

#598896

accent

#B3CC5C

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0706

muted

#7E7A7A

Preview Lab

Preview with #643B2F

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

Preview Lab → · Contrast checker → · Palette generator →