#641B1C#641B1C

#641B1C is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.2% C 0.105 H 23.9°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#641B1C
RGB	rgb(100, 27, 28)
HSL	hsl(359, 57%, 25%)
HSV	hsv(359, 73%, 39%)
CMYK	cmyk(0%, 73%, 72%, 60.8%)
CIE-LAB	lab(22.22, 32.74, 18.17)
CIE-LCH	lch(22.22, 37.44, 29.02°)
OKLab	oklab(34.22% 0.0959 0.0425)
OKLCH	oklch(34.22% 0.105 23.9)
XYZ	xyz(5.8577, 3.5779, 1.4805)
Luminance	0.0358 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B1C #1B6463

analogous

#641B41 #641B1C #643F1B

triadic

#641B1C #1C641B #1B1C64

tetradic

#641B1C #41641B #1B6463 #3F1B64

square

#641B1C #41641B #1B6463 #3F1B64

split-complementary

#641B1C #1B643F #1B4164

monochromatic

#180707 #340E0F #641B1C #942829 #C43537

Accessibility & contrast

On white

12.24

#641B1C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#641B1C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B1C

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B1C	#FFFFFF	#000000	##FFFFFF
##641B1C	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F2B1B

Deuteranopia (green-blind)

#413B1A

Tritanopia (blue-blind)

#6E061C

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641b1c;
/* rgb */ color: rgb(100, 27, 28);
/* oklch */ color: oklch(34.2% 0.105 23.9);

Tailwind

colors: {
  custom: {
    50: '#965d58',
    500: '#641b1c',
    950: '#000000',
  },
}

SCSS

$custom: #641b1c;
$custom-light: #965d58;
$custom-dark: #000000;

JSON

{
  "hex": "#641b1c",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 28
  },
  "hsl": {
    "h": 359.178,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34215,
    "c": 0.10488,
    "h": 23.9
  },
  "luminance": 0.03577
}

Semantic roles & 50–950 ramp

primary

#641B1C

secondary

#419998

accent

#E1DF47

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #641B1C

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

Preview Lab → · Contrast checker → · Palette generator →