#641B21#641B21

#641B21 is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.104 H 20.0°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).

Color values

HEX	#641B21
RGB	rgb(100, 27, 33)
HSL	hsl(355, 57%, 25%)
HSV	hsv(355, 73%, 39%)
CMYK	cmyk(0%, 73%, 67%, 60.8%)
CIE-LAB	lab(22.32, 33.07, 14.90)
CIE-LCH	lch(22.32, 36.27, 24.26°)
OKLab	oklab(34.31% 0.0981 0.0358)
OKLCH	oklch(34.31% 0.104 20)
XYZ	xyz(5.9226, 3.6038, 1.8223)
Luminance	0.0360 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B21 #1B645E

analogous

#641B46 #641B21 #64391B

triadic

#641B21 #21641B #1B2164

tetradic

#641B21 #46641B #1B645E #391B64

square

#641B21 #46641B #1B645E #391B64

split-complementary

#641B21 #1B6439 #1B4664

monochromatic

#180708 #340E11 #641B21 #942831 #C43541

Accessibility & contrast

On white

12.21

#641B21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#641B21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B21

12.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B21	#FFFFFF	#000000	##FFFFFF
##641B21	1.00	12.21	1.72	12.21
#FFFFFF	12.21	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2C21

Deuteranopia (green-blind)

#413B1F

Tritanopia (blue-blind)

#6E081E

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641b21;
/* rgb */ color: rgb(100, 27, 33);
/* oklch */ color: oklch(34.3% 0.104 20.0);

Tailwind

colors: {
  custom: {
    50: '#965d5c',
    500: '#641b21',
    950: '#000000',
  },
}

SCSS

$custom: #641b21;
$custom-light: #965d5c;
$custom-dark: #000000;

JSON

{
  "hex": "#641b21",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 33
  },
  "hsl": {
    "h": 355.068,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34313,
    "c": 0.1044,
    "h": 20
  },
  "luminance": 0.03603
}

Semantic roles & 50–950 ramp

primary

#641B21

secondary

#419992

accent

#E1D447

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0404

muted

#7E7979

Preview Lab

Preview with #641B21

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

Preview Lab → · Contrast checker → · Palette generator →