#641728#641728

#641728 is a dark, moderate red. Relative luminance 0.035; OKLCH L 34.0% C 0.109 H 12.5°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#641728
RGB	rgb(100, 23, 40)
HSL	hsl(347, 63%, 24%)
HSV	hsv(347, 77%, 39%)
CMYK	cmyk(0%, 77%, 60%, 60.8%)
CIE-LAB	lab(21.86, 35.30, 9.47)
CIE-LCH	lch(21.86, 36.55, 15.02°)
OKLab	oklab(34.02% 0.1066 0.0237)
OKLCH	oklch(34.02% 0.109 12.5)
XYZ	xyz(5.9455, 3.4762, 2.3650)
Luminance	0.0348 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641728 #176453

analogous

#64174F #641728 #642D17

triadic

#641728 #286417 #172864

tetradic

#641728 #4F6417 #176453 #2D1764

square

#641728 #4F6417 #176453 #2D1764

split-complementary

#641728 #17642D #174F64

monochromatic

#19060A #320C14 #641728 #96223C #C82E50

Accessibility & contrast

On white

12.39

#641728 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#641728 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641728

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641728	#FFFFFF	#000000	##FFFFFF
##641728	1.00	12.39	1.70	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B2A28

Deuteranopia (green-blind)

#3F3A26

Tritanopia (blue-blind)

#6E041E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #641728;
/* rgb */ color: rgb(100, 23, 40);
/* oklch */ color: oklch(34.0% 0.109 12.5);

Tailwind

colors: {
  custom: {
    50: '#955b61',
    500: '#641728',
    950: '#000000',
  },
}

SCSS

$custom: #641728;
$custom-light: #955b61;
$custom-dark: #000000;

JSON

{
  "hex": "#641728",
  "rgb": {
    "r": 100,
    "g": 23,
    "b": 40
  },
  "hsl": {
    "h": 346.753,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.34023,
    "c": 0.10918,
    "h": 12.5
  },
  "luminance": 0.03475
}

Semantic roles & 50–950 ramp

primary

#641728

secondary

#3C9A86

accent

#E6C242

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0405

muted

#7E7979

Preview Lab

Preview with #641728

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

Preview Lab → · Contrast checker → · Palette generator →