#641B1D#641B1D

#641B1D is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.2% C 0.105 H 23.1°. Best body text is #FFFFFF at 12.23:1 contrast (WCAG AA passes).

Color values

HEX	#641B1D
RGB	rgb(100, 27, 29)
HSL	hsl(358, 57%, 25%)
HSV	hsv(358, 73%, 39%)
CMYK	cmyk(0%, 73%, 71%, 60.8%)
CIE-LAB	lab(22.24, 32.80, 17.52)
CIE-LCH	lch(22.24, 37.19, 28.10°)
OKLab	oklab(34.23% 0.0963 0.0412)
OKLCH	oklch(34.23% 0.105 23.1)
XYZ	xyz(5.8698, 3.5827, 1.5446)
Luminance	0.0358 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B1D #1B6462

analogous

#641B42 #641B1D #643D1B

triadic

#641B1D #1D641B #1B1D64

tetradic

#641B1D #42641B #1B6462 #3D1B64

square

#641B1D #42641B #1B6462 #3D1B64

split-complementary

#641B1D #1B643D #1B4264

monochromatic

#180707 #340E0F #641B1D #94282B #C43539

Accessibility & contrast

On white

12.23

#641B1D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#641B1D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B1D

12.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B1D	#FFFFFF	#000000	##FFFFFF
##641B1D	1.00	12.23	1.72	12.23
#FFFFFF	12.23	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F2B1C

Deuteranopia (green-blind)

#413B1B

Tritanopia (blue-blind)

#6E071C

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641b1d;
/* rgb */ color: rgb(100, 27, 29);
/* oklch */ color: oklch(34.2% 0.105 23.1);

Tailwind

colors: {
  custom: {
    50: '#965d58',
    500: '#641b1d',
    950: '#000000',
  },
}

SCSS

$custom: #641b1d;
$custom-light: #965d58;
$custom-dark: #000000;

JSON

{
  "hex": "#641b1d",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 29
  },
  "hsl": {
    "h": 358.356,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34233,
    "c": 0.10476,
    "h": 23.1
  },
  "luminance": 0.03582
}

Semantic roles & 50–950 ramp

primary

#641B1D

secondary

#419997

accent

#E1DD47

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #641B1D

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

Preview Lab → · Contrast checker → · Palette generator →