#640313#640313

#640313 is a dark, vivid red. Relative luminance 0.028; OKLCH L 32.0% C 0.126 H 21.6°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#640313
RGB	rgb(100, 3, 19)
HSL	hsl(350, 94%, 20%)
HSV	hsv(350, 97%, 39%)
CMYK	cmyk(0%, 97%, 81%, 60.8%)
CIE-LAB	lab(19.32, 40.06, 20.78)
CIE-LCH	lch(19.32, 45.12, 27.41°)
OKLab	oklab(32.01% 0.117 0.0463)
OKLCH	oklch(32.01% 0.126 21.6)
XYZ	xyz(5.4063, 2.8224, 0.8761)
Luminance	0.0282 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#640313 #036454

analogous

#640343 #640313 #642303

triadic

#640313 #136403 #031364

tetradic

#640313 #436403 #036454 #230364

square

#640313 #436403 #036454 #230364

split-complementary

#640313 #036423 #034364

monochromatic

#1E0106 #290108 #640313 #9F051E #DB072A

Accessibility & contrast

On white

13.43

#640313 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#640313 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #640313

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##640313	#FFFFFF	#000000	##FFFFFF
##640313	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#262213

Deuteranopia (green-blind)

#3D360F

Tritanopia (blue-blind)

#6F000B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #640313;
/* rgb */ color: rgb(100, 3, 19);
/* oklch */ color: oklch(32.0% 0.126 21.6);

Tailwind

colors: {
  custom: {
    50: '#985350',
    500: '#640313',
    950: '#000000',
  },
}

SCSS

$custom: #640313;
$custom-light: #985350;
$custom-dark: #000000;

JSON

{
  "hex": "#640313",
  "rgb": {
    "r": 100,
    "g": 3,
    "b": 19
  },
  "hsl": {
    "h": 350.103,
    "s": 94.175,
    "l": 20.196
  },
  "oklch": {
    "l": 0.32013,
    "c": 0.12579,
    "h": 21.6
  },
  "luminance": 0.02821
}

Semantic roles & 50–950 ramp

primary

#640313

secondary

#21A28C

accent

#FFDC29

background

#FAF5F4

surface

#F4E9E7

border

#CEC5C3

text

#0F0302

muted

#7F7878

Preview Lab

Preview with #640313

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

Preview Lab → · Contrast checker → · Palette generator →