#641B1F#641B1F

#641B1F is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.105 H 21.6°. Best body text is #FFFFFF at 12.22:1 contrast (WCAG AA passes).

Color values

HEX	#641B1F
RGB	rgb(100, 27, 31)
HSL	hsl(357, 57%, 25%)
HSV	hsv(357, 73%, 39%)
CMYK	cmyk(0%, 73%, 69%, 60.8%)
CIE-LAB	lab(22.28, 32.93, 16.21)
CIE-LCH	lch(22.28, 36.71, 26.21°)
OKLab	oklab(34.27% 0.0972 0.0385)
OKLCH	oklch(34.27% 0.105 21.6)
XYZ	xyz(5.8954, 3.5930, 1.6791)
Luminance	0.0359 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B1F #1B6460

analogous

#641B44 #641B1F #643B1B

triadic

#641B1F #1F641B #1B1F64

tetradic

#641B1F #44641B #1B6460 #3B1B64

square

#641B1F #44641B #1B6460 #3B1B64

split-complementary

#641B1F #1B643B #1B4464

monochromatic

#180707 #340E10 #641B1F #94282E #C4353D

Accessibility & contrast

On white

12.22

#641B1F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#641B1F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B1F

12.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B1F	#FFFFFF	#000000	##FFFFFF
##641B1F	1.00	12.22	1.72	12.22
#FFFFFF	12.22	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F2B1F

Deuteranopia (green-blind)

#413B1D

Tritanopia (blue-blind)

#6E071D

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641b1f;
/* rgb */ color: rgb(100, 27, 31);
/* oklch */ color: oklch(34.3% 0.105 21.6);

Tailwind

colors: {
  custom: {
    50: '#965d5a',
    500: '#641b1f',
    950: '#000000',
  },
}

SCSS

$custom: #641b1f;
$custom-light: #965d5a;
$custom-dark: #000000;

JSON

{
  "hex": "#641b1f",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 31
  },
  "hsl": {
    "h": 356.712,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34272,
    "c": 0.10455,
    "h": 21.6
  },
  "luminance": 0.03592
}

Semantic roles & 50–950 ramp

primary

#641B1F

secondary

#419995

accent

#E1D847

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #641B1F

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

Preview Lab → · Contrast checker → · Palette generator →