#42171C#42171C

#42171C is a dark, moderate red. Relative luminance 0.019; OKLCH L 27.3% C 0.067 H 15.6°. Best body text is #FFFFFF at 15.32:1 contrast (WCAG AA passes).

Color values

HEX	#42171C
RGB	rgb(66, 23, 28)
HSL	hsl(353, 48%, 17%)
HSV	hsv(353, 65%, 26%)
CMYK	cmyk(0%, 65.2%, 57.6%, 74.1%)
CIE-LAB	lab(14.71, 21.38, 7.11)
CIE-LCH	lch(14.71, 22.53, 18.39°)
OKLab	oklab(27.3% 0.0644 0.0179)
OKLCH	oklch(27.3% 0.067 15.6)
XYZ	xyz(2.7630, 1.8552, 1.3110)
Luminance	0.0186 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42171C #17423D

analogous

#421732 #42171C #422717

triadic

#42171C #1C4217 #171C42

tetradic

#42171C #324217 #17423D #271742

square

#42171C #324217 #17423D #271742

split-complementary

#42171C #174227 #173242

monochromatic

#17080A #17080A #42171C #6F272F #9D3743

Accessibility & contrast

On white

15.32

#42171C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#42171C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42171C

15.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42171C	#FFFFFF	#000000	##FFFFFF
##42171C	1.00	15.32	1.37	15.32
#FFFFFF	15.32	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21201C

Deuteranopia (green-blind)

#2C281B

Tritanopia (blue-blind)

#481119

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #42171c;
/* rgb */ color: rgb(66, 23, 28);
/* oklch */ color: oklch(27.3% 0.067 15.6);

Tailwind

colors: {
  custom: {
    50: '#795657',
    500: '#42171c',
    950: '#000000',
  },
}

SCSS

$custom: #42171c;
$custom-light: #795657;
$custom-dark: #000000;

JSON

{
  "hex": "#42171c",
  "rgb": {
    "r": 66,
    "g": 23,
    "b": 28
  },
  "hsl": {
    "h": 353.023,
    "s": 48.315,
    "l": 17.451
  },
  "oklch": {
    "l": 0.27301,
    "c": 0.06681,
    "h": 15.6
  },
  "luminance": 0.01855
}

Semantic roles & 50–950 ramp

primary

#42171C

secondary

#3C7972

accent

#D8C850

background

#F7F5F5

surface

#EEE9E9

border

#C9C5C5

text

#090303

muted

#7B7878

Preview Lab

Preview with #42171C

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

Preview Lab → · Contrast checker → · Palette generator →