#640307#640307

#640307 is a dark, vivid red. Relative luminance 0.028; OKLCH L 31.9% C 0.127 H 27.0°. Best body text is #FFFFFF at 13.48:1 contrast (WCAG AA passes).

Color values

HEX	#640307
RGB	rgb(100, 3, 7)
HSL	hsl(358, 94%, 20%)
HSV	hsv(358, 97%, 39%)
CMYK	cmyk(0%, 97%, 93%, 60.8%)
CIE-LAB	lab(19.19, 39.69, 26.51)
CIE-LCH	lch(19.19, 47.73, 33.74°)
OKLab	oklab(31.87% 0.113 0.0576)
OKLCH	oklch(31.87% 0.127 27)
XYZ	xyz(5.3271, 2.7907, 0.4592)
Luminance	0.0279 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#640307 #036460

analogous

#640337 #640307 #643003

triadic

#640307 #076403 #030764

tetradic

#640307 #376403 #036460 #300364

square

#640307 #376403 #036460 #300364

split-complementary

#640307 #036430 #033764

monochromatic

#1E0102 #290103 #640307 #9F050B #DB070F

Accessibility & contrast

On white

13.48

#640307 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#640307 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #640307

13.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##640307	#FFFFFF	#000000	##FFFFFF
##640307	1.00	13.48	1.56	13.48
#FFFFFF	13.48	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#272106

Deuteranopia (green-blind)

#3D3602

Tritanopia (blue-blind)

#6F0006

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #640307;
/* rgb */ color: rgb(100, 3, 7);
/* oklch */ color: oklch(31.9% 0.127 27.0);

Tailwind

colors: {
  custom: {
    50: '#995349',
    500: '#640307',
    950: '#000000',
  },
}

SCSS

$custom: #640307;
$custom-light: #995349;
$custom-dark: #000000;

JSON

{
  "hex": "#640307",
  "rgb": {
    "r": 100,
    "g": 3,
    "b": 7
  },
  "hsl": {
    "h": 357.526,
    "s": 94.175,
    "l": 20.196
  },
  "oklch": {
    "l": 0.31873,
    "c": 0.12681,
    "h": 27
  },
  "luminance": 0.0279
}

Semantic roles & 50–950 ramp

primary

#640307

secondary

#21A29C

accent

#FFF629

background

#FAF5F4

surface

#F4E9E7

border

#CEC5C3

text

#0F0301

muted

#7F7877

Preview Lab

Preview with #640307

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

Preview Lab → · Contrast checker → · Palette generator →