#42170B#42170B

#42170B is a dark, moderate red. Relative luminance 0.018; OKLCH L 26.9% C 0.070 H 36.4°. Best body text is #FFFFFF at 15.45:1 contrast (WCAG AA passes).

Color values

HEX	#42170B
RGB	rgb(66, 23, 11)
HSL	hsl(13, 71%, 15%)
HSV	hsv(13, 83%, 26%)
CMYK	cmyk(0%, 65.2%, 83.3%, 74.1%)
CIE-LAB	lab(14.38, 19.99, 17.27)
CIE-LCH	lch(14.38, 26.42, 40.82°)
OKLab	oklab(26.94% 0.0566 0.0417)
OKLCH	oklch(26.94% 0.07 36.4)
XYZ	xyz(2.6138, 1.7956, 0.5255)
Luminance	0.0180 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42170B #0B3642

analogous

#420B1A #42170B #42330B

triadic

#42170B #0B4217 #170B42

tetradic

#42170B #1A420B #0B3642 #330B42

square

#42170B #1A420B #0B3642 #330B42

split-complementary

#42170B #0B4233 #0B1A42

monochromatic

#1A0904 #1A0904 #42170B #762914 #AB3C1C

Accessibility & contrast

On white

15.45

#42170B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#42170B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42170B

15.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42170B	#FFFFFF	#000000	##FFFFFF
##42170B	1.00	15.45	1.36	15.45
#FFFFFF	15.45	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#231E0A

Deuteranopia (green-blind)

#2D280A

Tritanopia (blue-blind)

#490D14

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #42170b;
/* rgb */ color: rgb(66, 23, 11);
/* oklch */ color: oklch(26.9% 0.070 36.4);

Tailwind

colors: {
  custom: {
    50: '#7b564b',
    500: '#42170b',
    950: '#000000',
  },
}

SCSS

$custom: #42170b;
$custom-light: #7b564b;
$custom-dark: #000000;

JSON

{
  "hex": "#42170b",
  "rgb": {
    "r": 66,
    "g": 23,
    "b": 11
  },
  "hsl": {
    "h": 13.091,
    "s": 71.429,
    "l": 15.098
  },
  "oklch": {
    "l": 0.26942,
    "c": 0.07026,
    "h": 36.4
  },
  "luminance": 0.01795
}

Semantic roles & 50–950 ramp

primary

#42170B

secondary

#2A6C7F

accent

#C7EE3A

background

#F7F5F4

surface

#EEE9E7

border

#C9C5C3

text

#0A0301

muted

#7C7877

Preview Lab

Preview with #42170B

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

Preview Lab → · Contrast checker → · Palette generator →