#641C1B#641C1B

#641C1B is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.3% C 0.104 H 25.1°. Best body text is #FFFFFF at 12.18:1 contrast (WCAG AA passes).

Color values

HEX	#641C1B
RGB	rgb(100, 28, 27)
HSL	hsl(1, 57%, 25%)
HSV	hsv(1, 73%, 39%)
CMYK	cmyk(0%, 72%, 73%, 60.8%)
CIE-LAB	lab(22.37, 32.23, 19.01)
CIE-LCH	lch(22.37, 37.42, 30.54°)
OKLab	oklab(34.32% 0.0941 0.0442)
OKLCH	oklch(34.32% 0.104 25.1)
XYZ	xyz(5.8692, 3.6198, 1.4263)
Luminance	0.0362 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641C1B #1B6364

analogous

#641B3F #641C1B #64411B

triadic

#641C1B #1B641C #1C1B64

tetradic

#641C1B #3F641B #1B6364 #411B64

square

#641C1B #3F641B #1B6364 #411B64

split-complementary

#641C1B #1B6441 #1B3F64

monochromatic

#180707 #340F0E #641C1B #942928 #C43735

Accessibility & contrast

On white

12.18

#641C1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#641C1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641C1B

12.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641C1B	#FFFFFF	#000000	##FFFFFF
##641C1B	1.00	12.18	1.72	12.18
#FFFFFF	12.18	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302C1A

Deuteranopia (green-blind)

#423B19

Tritanopia (blue-blind)

#6E081D

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641c1b;
/* rgb */ color: rgb(100, 28, 27);
/* oklch */ color: oklch(34.3% 0.104 25.1);

Tailwind

colors: {
  custom: {
    50: '#965d57',
    500: '#641c1b',
    950: '#000000',
  },
}

SCSS

$custom: #641c1b;
$custom-light: #965d57;
$custom-dark: #000000;

JSON

{
  "hex": "#641c1b",
  "rgb": {
    "r": 100,
    "g": 28,
    "b": 27
  },
  "hsl": {
    "h": 0.822,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.3432,
    "c": 0.10391,
    "h": 25.1
  },
  "luminance": 0.03619
}

Semantic roles & 50–950 ramp

primary

#641C1B

secondary

#419899

accent

#DFE147

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #641C1B

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

Preview Lab → · Contrast checker → · Palette generator →