#641B23#641B23

#641B23 is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.4% C 0.104 H 18.4°. Best body text is #FFFFFF at 12.19:1 contrast (WCAG AA passes).

Color values

HEX	#641B23
RGB	rgb(100, 27, 35)
HSL	hsl(353, 57%, 25%)
HSV	hsv(353, 73%, 39%)
CMYK	cmyk(0%, 73%, 65%, 60.8%)
CIE-LAB	lab(22.36, 33.22, 13.59)
CIE-LCH	lch(22.36, 35.89, 22.25°)
OKLab	oklab(34.36% 0.099 0.033)
OKLCH	oklch(34.36% 0.104 18.4)
XYZ	xyz(5.9514, 3.6154, 1.9742)
Luminance	0.0362 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#641B23 #1B645C

analogous

#641B47 #641B23 #64381B

triadic

#641B23 #23641B #1B2364

tetradic

#641B23 #47641B #1B645C #381B64

square

#641B23 #47641B #1B645C #381B64

split-complementary

#641B23 #1B6438 #1B4764

monochromatic

#180708 #340E12 #641B23 #942834 #C43545

Accessibility & contrast

On white

12.19

#641B23 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#641B23 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #641B23

12.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##641B23	#FFFFFF	#000000	##FFFFFF
##641B23	1.00	12.19	1.72	12.19
#FFFFFF	12.19	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2C23

Deuteranopia (green-blind)

#413B21

Tritanopia (blue-blind)

#6E091E

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #641b23;
/* rgb */ color: rgb(100, 27, 35);
/* oklch */ color: oklch(34.4% 0.104 18.4);

Tailwind

colors: {
  custom: {
    50: '#955d5d',
    500: '#641b23',
    950: '#000000',
  },
}

SCSS

$custom: #641b23;
$custom-light: #955d5d;
$custom-dark: #000000;

JSON

{
  "hex": "#641b23",
  "rgb": {
    "r": 100,
    "g": 27,
    "b": 35
  },
  "hsl": {
    "h": 353.425,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34357,
    "c": 0.10431,
    "h": 18.4
  },
  "luminance": 0.03615
}

Semantic roles & 50–950 ramp

primary

#641B23

secondary

#419990

accent

#E1D047

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0404

muted

#7E7979

Preview Lab

Preview with #641B23

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

Preview Lab → · Contrast checker → · Palette generator →