#641B18#641B18

#641B18 is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.1% C 0.105 H 26.7°. Best body text is #FFFFFF at 12.27:1 contrast (WCAG AA passes).

Color values

HEX	#641B18
RGB	rgb(100, 27, 24)
HSL	hsl(2, 61%, 24%)
HSV	hsv(2, 76%, 39%)
CMYK	cmyk(0%, 73%, 76%, 60.8%)
CIE-LAB	lab(22.16, 32.51, 20.74)
CIE-LCH	lch(22.16, 38.56, 32.53°)
OKLab	oklab(34.15% 0.0943 0.0474)
OKLCH	oklch(34.15% 0.105 26.7)
XYZ	xyz(5.8130, 3.5600, 1.2450)
Luminance	0.0356 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B18 #186164

analogous

#64183B #641B18 #644118

triadic

#641B18 #18641B #1B1864

tetradic

#641B18 #3B6418 #186164 #411864

square

#641B18 #3B6418 #186164 #411864

split-complementary

#641B18 #186441 #183B64

monochromatic

#190706 #330E0C #641B18 #952824 #C73630

Accessibility & contrast

On white

12.27

#641B18 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#641B18 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B18

12.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B18	#FFFFFF	#000000	##FFFFFF
##641B18	1.00	12.27	1.71	12.27
#FFFFFF	12.27	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302B17

Deuteranopia (green-blind)

#423B16

Tritanopia (blue-blind)

#6F051B

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641b18;
/* rgb */ color: rgb(100, 27, 24);
/* oklch */ color: oklch(34.1% 0.105 26.7);

Tailwind

colors: {
  custom: {
    50: '#965c55',
    500: '#641b18',
    950: '#000000',
  },
}

SCSS

$custom: #641b18;
$custom-light: #965c55;
$custom-dark: #000000;

JSON

{
  "hex": "#641b18",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 24
  },
  "hsl": {
    "h": 2.368,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.34146,
    "c": 0.10548,
    "h": 26.7
  },
  "luminance": 0.03559
}

Semantic roles & 50–950 ramp

primary

#641B18

secondary

#3E979A

accent

#DEE443

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #641B18

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

Preview Lab → · Contrast checker → · Palette generator →