#643F0F#643F0F

#643F0F is a dark, moderate orange. Relative luminance 0.063; OKLCH L 40.2% C 0.079 H 68.0°. Best body text is #FFFFFF at 9.29:1 contrast (WCAG AA passes).

Color values

HEX	#643F0F
RGB	rgb(100, 63, 15)
HSL	hsl(34, 74%, 23%)
HSV	hsv(34, 85%, 39%)
CMYK	cmyk(0%, 37%, 85%, 60.8%)
CIE-LAB	lab(30.16, 11.82, 33.95)
CIE-LCH	lch(30.16, 35.95, 70.80°)
OKLab	oklab(40.22% 0.0297 0.0735)
OKLCH	oklch(40.22% 0.079 68)
XYZ	xyz(7.1198, 6.2995, 1.2928)
Luminance	0.0630 (WCAG relative)
Temperature	warm
Family	orange

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#643F0F #0F3464

analogous

#64140F #643F0F #5F640F

triadic

#643F0F #0F643F #3F0F64

tetradic

#643F0F #0F6414 #0F3464 #640F5F

square

#643F0F #0F6414 #0F3464 #640F5F

split-complementary

#643F0F #0F5F64 #140F64

monochromatic

#1B1104 #2F1D07 #643F0F #996117 #CE821F

Accessibility & contrast

On white

9.29

#643F0F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#643F0F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #643F0F

9.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##643F0F	#FFFFFF	#000000	##FFFFFF
##643F0F	1.00	9.29	2.26	9.29
#FFFFFF	9.29	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B4207

Deuteranopia (green-blind)

#544A10

Tritanopia (blue-blind)

#6E3636

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #643f0f;
/* rgb */ color: rgb(100, 63, 15);
/* oklch */ color: oklch(40.2% 0.079 68.0);

Tailwind

colors: {
  custom: {
    50: '#957452',
    500: '#643f0f',
    950: '#000000',
  },
}

SCSS

$custom: #643f0f;
$custom-light: #957452;
$custom-dark: #000000;

JSON

{
  "hex": "#643f0f",
  "rgb": {
    "r": 100,
    "g": 63,
    "b": 15
  },
  "hsl": {
    "h": 33.882,
    "s": 73.913,
    "l": 22.549
  },
  "oklch": {
    "l": 0.40224,
    "c": 0.0793,
    "h": 68
  },
  "luminance": 0.06299
}

Semantic roles & 50–950 ramp

primary

#643F0F

secondary

#32609D

accent

#88F137

background

#F9F7F4

surface

#F2EDE7

border

#CCC8C3

text

#0E0802

muted

#7E7B78

Preview Lab

Preview with #643F0F

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

Preview Lab → · Contrast checker → · Palette generator →