#42171B#42171B

#42171B is a dark, moderate red. Relative luminance 0.018; OKLCH L 27.3% C 0.067 H 17.0°. Best body text is #FFFFFF at 15.33:1 contrast (WCAG AA passes).

Color values

HEX	#42171B
RGB	rgb(66, 23, 27)
HSL	hsl(354, 48%, 17%)
HSV	hsv(354, 65%, 26%)
CMYK	cmyk(0%, 65.2%, 59.1%, 74.1%)
CIE-LAB	lab(14.68, 21.27, 7.79)
CIE-LCH	lch(14.68, 22.65, 20.13°)
OKLab	oklab(27.27% 0.0639 0.0196)
OKLCH	oklch(27.27% 0.067 17)
XYZ	xyz(2.7512, 1.8505, 1.2490)
Luminance	0.0185 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42171B #17423E

analogous

#421730 #42171B #422917

triadic

#42171B #1B4217 #171B42

tetradic

#42171B #304217 #17423E #291742

square

#42171B #304217 #17423E #291742

split-complementary

#42171B #174229 #173042

monochromatic

#170809 #170809 #42171B #6F272E #9D3740

Accessibility & contrast

On white

15.33

#42171B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#42171B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42171B

15.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42171B	#FFFFFF	#000000	##FFFFFF
##42171B	1.00	15.33	1.37	15.33
#FFFFFF	15.33	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#211F1B

Deuteranopia (green-blind)

#2C281A

Tritanopia (blue-blind)

#491019

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #42171b;
/* rgb */ color: rgb(66, 23, 27);
/* oklch */ color: oklch(27.3% 0.067 17.0);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#42171b",
  "rgb": {
    "r": 66,
    "g": 23,
    "b": 27
  },
  "hsl": {
    "h": 354.419,
    "s": 48.315,
    "l": 17.451
  },
  "oklch": {
    "l": 0.27273,
    "c": 0.06681,
    "h": 17
  },
  "luminance": 0.0185
}

Semantic roles & 50–950 ramp

primary

#42171B

secondary

#3C7973

accent

#D8CB50

background

#F7F5F5

surface

#EEE9E9

border

#C9C5C5

text

#090303

muted

#7B7878

Preview Lab

Preview with #42171B

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

Preview Lab → · Contrast checker → · Palette generator →