#4B181C#4B181C

#4B181C is a dark, moderate red. Relative luminance 0.022; OKLCH L 29.1% C 0.077 H 18.7°. Best body text is #FFFFFF at 14.52:1 contrast (WCAG AA passes).

Color values

HEX	#4B181C
RGB	rgb(75, 24, 28)
HSL	hsl(355, 52%, 19%)
HSV	hsv(355, 68%, 29%)
CMYK	cmyk(0%, 68%, 62.7%, 70.6%)
CIE-LAB	lab(16.67, 24.55, 10.05)
CIE-LCH	lch(16.67, 26.53, 22.26°)
OKLab	oklab(29.11% 0.0734 0.0248)
OKLCH	oklch(29.11% 0.077 18.7)
XYZ	xyz(3.4382, 2.2334, 1.3484)
Luminance	0.0223 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B181C #184B47

analogous

#4B1836 #4B181C #4B2E18

triadic

#4B181C #1C4B18 #181C4B

tetradic

#4B181C #364B18 #184B47 #2E184B

square

#4B181C #364B18 #184B47 #2E184B

split-complementary

#4B181C #184B2E #18364B

monochromatic

#170709 #1D090B #4B181C #79272D #A8363F

Accessibility & contrast

On white

14.52

#4B181C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#4B181C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B181C

14.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B181C	#FFFFFF	#000000	##FFFFFF
##4B181C	1.00	14.52	1.45	14.52
#FFFFFF	14.52	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#24221C

Deuteranopia (green-blind)

#312D1B

Tritanopia (blue-blind)

#530F1A

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #4b181c;
/* rgb */ color: rgb(75, 24, 28);
/* oklch */ color: oklch(29.1% 0.077 18.7);

Tailwind

colors: {
  custom: {
    50: '#815857',
    500: '#4b181c',
    950: '#000000',
  },
}

SCSS

$custom: #4b181c;
$custom-light: #815857;
$custom-dark: #000000;

JSON

{
  "hex": "#4b181c",
  "rgb": {
    "r": 75,
    "g": 24,
    "b": 28
  },
  "hsl": {
    "h": 355.294,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.29111,
    "c": 0.07745,
    "h": 18.7
  },
  "luminance": 0.02233
}

Semantic roles & 50–950 ramp

primary

#4B181C

secondary

#3D827C

accent

#DBD04D

background

#F8F5F5

surface

#EFE9E9

border

#CAC5C5

text

#0B0303

muted

#7C7878

Preview Lab

Preview with #4B181C

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

Preview Lab → · Contrast checker → · Palette generator →