#641B2B#641B2B

#641B2B is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.6% C 0.105 H 11.6°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#641B2B
RGB	rgb(100, 27, 43)
HSL	hsl(347, 57%, 25%)
HSV	hsv(347, 73%, 39%)
CMYK	cmyk(0%, 73%, 57%, 60.8%)
CIE-LAB	lab(22.54, 33.88, 8.33)
CIE-LCH	lch(22.54, 34.88, 13.81°)
OKLab	oklab(34.56% 0.1025 0.0211)
OKLCH	oklch(34.56% 0.105 11.6)
XYZ	xyz(6.0840, 3.6684, 2.6727)
Luminance	0.0367 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B2B #1B6454

analogous

#641B50 #641B2B #642F1B

triadic

#641B2B #2B641B #1B2B64

tetradic

#641B2B #50641B #1B6454 #2F1B64

square

#641B2B #50641B #1B6454 #2F1B64

split-complementary

#641B2B #1B642F #1B5064

monochromatic

#18070A #340E16 #641B2B #942840 #C43554

Accessibility & contrast

On white

12.11

#641B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#641B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B2B

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B2B	#FFFFFF	#000000	##FFFFFF
##641B2B	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D2C2B

Deuteranopia (green-blind)

#403B29

Tritanopia (blue-blind)

#6E0C21

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #641b2b;
/* rgb */ color: rgb(100, 27, 43);
/* oklch */ color: oklch(34.6% 0.105 11.6);

Tailwind

colors: {
  custom: {
    50: '#955d64',
    500: '#641b2b',
    950: '#000000',
  },
}

SCSS

$custom: #641b2b;
$custom-light: #955d64;
$custom-dark: #000000;

JSON

{
  "hex": "#641b2b",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 43
  },
  "hsl": {
    "h": 346.849,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34556,
    "c": 0.10463,
    "h": 11.6
  },
  "luminance": 0.03668
}

Semantic roles & 50–950 ramp

primary

#641B2B

secondary

#419986

accent

#E1BF47

background

#F9F5F5

surface

#F2E9EA

border

#CCC5C6

text

#0E0405

muted

#7E7979

Preview Lab

Preview with #641B2B

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

Preview Lab → · Contrast checker → · Palette generator →