#643A2F#643A2F

#643A2F is a dark, moderate red. Relative luminance 0.059; OKLCH L 39.7% C 0.063 H 35.5°. Best body text is #FFFFFF at 9.60:1 contrast (WCAG AA passes).

Color values

HEX	#643A2F
RGB	rgb(100, 58, 47)
HSL	hsl(12, 36%, 29%)
HSV	hsv(12, 53%, 39%)
CMYK	cmyk(0%, 42%, 53%, 60.8%)
CIE-LAB	lab(29.26, 17.26, 14.74)
CIE-LCH	lch(29.26, 22.70, 40.50°)
OKLab	oklab(39.67% 0.0512 0.0365)
OKLCH	oklch(39.67% 0.063 35.5)
XYZ	xyz(7.2821, 5.9413, 3.4520)
Luminance	0.0594 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643A2F #2F5964

analogous

#642F3F #643A2F #64552F

triadic

#643A2F #2F643A #3A2F64

tetradic

#643A2F #3F642F #2F5964 #552F64

square

#643A2F #3F642F #2F5964 #552F64

split-complementary

#643A2F #2F6455 #2F3F64

monochromatic

#150C0A #3A221B #643A2F #8E5243 #B26D5B

Accessibility & contrast

On white

9.60

#643A2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#643A2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643A2F

9.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643A2F	#FFFFFF	#000000	##FFFFFF
##643A2F	1.00	9.60	2.19	9.60
#FFFFFF	9.60	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#44402E

Deuteranopia (green-blind)

#4E482E

Tritanopia (blue-blind)

#6D3337

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #643a2f;
/* rgb */ color: rgb(100, 58, 47);
/* oklch */ color: oklch(39.7% 0.063 35.5);

Tailwind

colors: {
  custom: {
    50: '#937067',
    500: '#643a2f',
    950: '#000000',
  },
}

SCSS

$custom: #643a2f;
$custom-light: #937067;
$custom-dark: #000000;

JSON

{
  "hex": "#643a2f",
  "rgb": {
    "r": 100,
    "g": 58,
    "b": 47
  },
  "hsl": {
    "h": 12.453,
    "s": 36.054,
    "l": 28.824
  },
  "oklch": {
    "l": 0.39672,
    "c": 0.06281,
    "h": 35.5
  },
  "luminance": 0.05941
}

Semantic roles & 50–950 ramp

primary

#643A2F

secondary

#598996

accent

#B5CC5C

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0706

muted

#7E7A7A

Preview Lab

Preview with #643A2F

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

Preview Lab → · Contrast checker → · Palette generator →