#4B181F#4B181F

#4B181F is a dark, moderate red. Relative luminance 0.022; OKLCH L 29.2% C 0.077 H 15.1°. Best body text is #FFFFFF at 14.49:1 contrast (WCAG AA passes).

Color values

HEX	#4B181F
RGB	rgb(75, 24, 31)
HSL	hsl(352, 52%, 19%)
HSV	hsv(352, 68%, 29%)
CMYK	cmyk(0%, 68%, 58.7%, 70.6%)
CIE-LAB	lab(16.74, 24.84, 8.01)
CIE-LCH	lch(16.74, 26.10, 17.87°)
OKLab	oklab(29.19% 0.0748 0.0201)
OKLCH	oklch(29.19% 0.077 15.1)
XYZ	xyz(3.4759, 2.2485, 1.5470)
Luminance	0.0225 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B181F #184B44

analogous

#4B1839 #4B181F #4B2B18

triadic

#4B181F #1F4B18 #181F4B

tetradic

#4B181F #394B18 #184B44 #2B184B

square

#4B181F #394B18 #184B44 #2B184B

split-complementary

#4B181F #184B2B #18394B

monochromatic

#17070A #1D090C #4B181F #792732 #A83645

Accessibility & contrast

On white

14.49

#4B181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#4B181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B181F

14.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B181F	#FFFFFF	#000000	##FFFFFF
##4B181F	1.00	14.49	1.45	14.49
#FFFFFF	14.49	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#24231F

Deuteranopia (green-blind)

#312D1E

Tritanopia (blue-blind)

#52101B

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #4b181f;
/* rgb */ color: rgb(75, 24, 31);
/* oklch */ color: oklch(29.2% 0.077 15.1);

Tailwind

colors: {
  custom: {
    50: '#81585a',
    500: '#4b181f',
    950: '#000000',
  },
}

SCSS

$custom: #4b181f;
$custom-light: #81585a;
$custom-dark: #000000;

JSON

{
  "hex": "#4b181f",
  "rgb": {
    "r": 75,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 351.765,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.2919,
    "c": 0.07743,
    "h": 15.1
  },
  "luminance": 0.02248
}

Semantic roles & 50–950 ramp

primary

#4B181F

secondary

#3D8278

accent

#DBC74D

background

#F8F5F5

surface

#EFE9E9

border

#CAC5C5

text

#0B0303

muted

#7C7878

Preview Lab

Preview with #4B181F

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

Preview Lab → · Contrast checker → · Palette generator →