#4B181B#4B181B

#4B181B is a dark, moderate red. Relative luminance 0.022; OKLCH L 29.1% C 0.078 H 19.9°. Best body text is #FFFFFF at 14.53:1 contrast (WCAG AA passes).

Color values

HEX	#4B181B
RGB	rgb(75, 24, 27)
HSL	hsl(356, 52%, 19%)
HSV	hsv(356, 68%, 29%)
CMYK	cmyk(0%, 68%, 64%, 70.6%)
CIE-LAB	lab(16.64, 24.46, 10.73)
CIE-LCH	lch(16.64, 26.71, 23.69°)
OKLab	oklab(29.09% 0.0729 0.0263)
OKLCH	oklch(29.09% 0.078 19.9)
XYZ	xyz(3.4264, 2.2287, 1.2864)
Luminance	0.0223 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B181B #184B48

analogous

#4B1835 #4B181B #4B2F18

triadic

#4B181B #1B4B18 #181B4B

tetradic

#4B181B #354B18 #184B48 #2F184B

square

#4B181B #354B18 #184B48 #2F184B

split-complementary

#4B181B #184B2F #18354B

monochromatic

#170708 #1D090A #4B181B #79272C #A8363C

Accessibility & contrast

On white

14.53

#4B181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#4B181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B181B

14.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B181B	#FFFFFF	#000000	##FFFFFF
##4B181B	1.00	14.53	1.45	14.53
#FFFFFF	14.53	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25221B

Deuteranopia (green-blind)

#312D1A

Tritanopia (blue-blind)

#530F19

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #4b181b;
/* rgb */ color: rgb(75, 24, 27);
/* oklch */ color: oklch(29.1% 0.078 19.9);

Tailwind

colors: {
  custom: {
    50: '#815857',
    500: '#4b181b',
    950: '#000000',
  },
}

SCSS

$custom: #4b181b;
$custom-light: #815857;
$custom-dark: #000000;

JSON

{
  "hex": "#4b181b",
  "rgb": {
    "r": 75,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 356.471,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.29087,
    "c": 0.07751,
    "h": 19.9
  },
  "luminance": 0.02228
}

Semantic roles & 50–950 ramp

primary

#4B181B

secondary

#3D827E

accent

#DBD34D

background

#F8F5F5

surface

#EFE9E9

border

#CAC5C5

text

#0B0303

muted

#7C7878

Preview Lab

Preview with #4B181B

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

Preview Lab → · Contrast checker → · Palette generator →