#640306#640306

#640306 is a dark, vivid red. Relative luminance 0.028; OKLCH L 31.9% C 0.127 H 27.4°. Best body text is #FFFFFF at 13.48:1 contrast (WCAG AA passes).

Color values

HEX	#640306
RGB	rgb(100, 3, 6)
HSL	hsl(358, 94%, 20%)
HSV	hsv(358, 97%, 39%)
CMYK	cmyk(0%, 97%, 94%, 60.8%)
CIE-LAB	lab(19.18, 39.66, 26.91)
CIE-LCH	lch(19.18, 47.93, 34.15°)
OKLab	oklab(31.86% 0.1127 0.0585)
OKLCH	oklch(31.86% 0.127 27.4)
XYZ	xyz(5.3217, 2.7885, 0.4303)
Luminance	0.0279 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#640306 #036461

analogous

#640337 #640306 #643003

triadic

#640306 #066403 #030664

tetradic

#640306 #376403 #036461 #300364

square

#640306 #376403 #036461 #300364

split-complementary

#640306 #036430 #033764

monochromatic

#1E0102 #290102 #640306 #9F050A #DB070D

Accessibility & contrast

On white

13.48

#640306 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#640306 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #640306

13.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##640306	#FFFFFF	#000000	##FFFFFF
##640306	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)

#272105

Deuteranopia (green-blind)

#3D3601

Tritanopia (blue-blind)

#6F0006

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #640306;
/* rgb */ color: rgb(100, 3, 6);
/* oklch */ color: oklch(31.9% 0.127 27.4);

Tailwind

colors: {
  custom: {
    50: '#995349',
    500: '#640306',
    950: '#000000',
  },
}

SCSS

$custom: #640306;
$custom-light: #995349;
$custom-dark: #000000;

JSON

{
  "hex": "#640306",
  "rgb": {
    "r": 100,
    "g": 3,
    "b": 6
  },
  "hsl": {
    "h": 358.144,
    "s": 94.175,
    "l": 20.196
  },
  "oklch": {
    "l": 0.31863,
    "c": 0.12692,
    "h": 27.4
  },
  "luminance": 0.02788
}

Semantic roles & 50–950 ramp

primary

#640306

secondary

#21A29E

accent

#FFF829

background

#FAF5F4

surface

#F4E9E6

border

#CEC5C2

text

#0F0300

muted

#7F7877

Preview Lab

Preview with #640306

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

Preview Lab → · Contrast checker → · Palette generator →