#42180B#42180B

#42180B is a dark, moderate red. Relative luminance 0.018; OKLCH L 27.1% C 0.069 H 37.6°. Best body text is #FFFFFF at 15.36:1 contrast (WCAG AA passes).

Color values

HEX	#42180B
RGB	rgb(66, 24, 11)
HSL	hsl(14, 71%, 15%)
HSV	hsv(14, 83%, 26%)
CMYK	cmyk(0%, 63.6%, 83.3%, 74.1%)
CIE-LAB	lab(14.60, 19.41, 17.56)
CIE-LCH	lch(14.60, 26.17, 42.15°)
OKLab	oklab(27.11% 0.0548 0.0422)
OKLCH	oklch(27.11% 0.069 37.6)
XYZ	xyz(2.6341, 1.8360, 0.5322)
Luminance	0.0184 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42180B #0B3542

analogous

#420B19 #42180B #42340B

triadic

#42180B #0B4218 #180B42

tetradic

#42180B #19420B #0B3542 #340B42

square

#42180B #19420B #0B3542 #340B42

split-complementary

#42180B #0B4234 #0B1942

monochromatic

#1A0A04 #1A0A04 #42180B #762B14 #AB3E1C

Accessibility & contrast

On white

15.36

#42180B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#42180B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42180B

15.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42180B	#FFFFFF	#000000	##FFFFFF
##42180B	1.00	15.36	1.37	15.36
#FFFFFF	15.36	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#241F09

Deuteranopia (green-blind)

#2E280A

Tritanopia (blue-blind)

#490F15

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #42180b;
/* rgb */ color: rgb(66, 24, 11);
/* oklch */ color: oklch(27.1% 0.069 37.6);

Tailwind

colors: {
  custom: {
    50: '#7b564b',
    500: '#42180b',
    950: '#000000',
  },
}

SCSS

$custom: #42180b;
$custom-light: #7b564b;
$custom-dark: #000000;

JSON

{
  "hex": "#42180b",
  "rgb": {
    "r": 66,
    "g": 24,
    "b": 11
  },
  "hsl": {
    "h": 14.182,
    "s": 71.429,
    "l": 15.098
  },
  "oklch": {
    "l": 0.27114,
    "c": 0.06913,
    "h": 37.6
  },
  "luminance": 0.01836
}

Semantic roles & 50–950 ramp

primary

#42180B

secondary

#2A6B7F

accent

#C3EE3A

background

#F7F5F4

surface

#EEE9E7

border

#C9C5C3

text

#0A0301

muted

#7C7877

Preview Lab

Preview with #42180B

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

Preview Lab → · Contrast checker → · Palette generator →