#4B180B#4B180B

#4B180B is a dark, moderate red. Relative luminance 0.022; OKLCH L 28.8% C 0.081 H 35.3°. Best body text is #FFFFFF at 14.64:1 contrast (WCAG AA passes).

Color values

HEX	#4B180B
RGB	rgb(75, 24, 11)
HSL	hsl(12, 74%, 17%)
HSV	hsv(12, 85%, 29%)
CMYK	cmyk(0%, 68%, 85.3%, 70.6%)
CIE-LAB	lab(16.37, 23.39, 20.18)
CIE-LCH	lch(16.37, 30.89, 40.78°)
OKLab	oklab(28.8% 0.066 0.0467)
OKLCH	oklch(28.8% 0.081 35.3)
XYZ	xyz(3.2890, 2.1737, 0.5629)
Luminance	0.0217 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B180B #0B3E4B

analogous

#4B0B1E #4B180B #4B380B

triadic

#4B180B #0B4B18 #180B4B

tetradic

#4B180B #1E4B0B #0B3E4B #380B4B

square

#4B180B #1E4B0B #0B3E4B #380B4B

split-complementary

#4B180B #0B4B38 #0B1E4B

monochromatic

#1B0904 #1B0904 #4B180B #802913 #B63A1B

Accessibility & contrast

On white

14.64

#4B180B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#4B180B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4B180B

14.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B180B	#FFFFFF	#000000	##FFFFFF
##4B180B	1.00	14.64	1.43	14.64
#FFFFFF	14.64	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#262109

Deuteranopia (green-blind)

#332D09

Tritanopia (blue-blind)

#530B15

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #4b180b;
/* rgb */ color: rgb(75, 24, 11);
/* oklch */ color: oklch(28.8% 0.081 35.3);

Tailwind

colors: {
  custom: {
    50: '#83574b',
    500: '#4b180b',
    950: '#000000',
  },
}

SCSS

$custom: #4b180b;
$custom-light: #83574b;
$custom-dark: #000000;

JSON

{
  "hex": "#4b180b",
  "rgb": {
    "r": 75,
    "g": 24,
    "b": 11
  },
  "hsl": {
    "h": 12.188,
    "s": 74.419,
    "l": 16.863
  },
  "oklch": {
    "l": 0.28796,
    "c": 0.08087,
    "h": 35.3
  },
  "luminance": 0.02173
}

Semantic roles & 50–950 ramp

primary

#4B180B

secondary

#2B7487

accent

#CBF137

background

#F8F5F4

surface

#F0E9E7

border

#CBC5C3

text

#0B0301

muted

#7C7877

Preview Lab

Preview with #4B180B

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

Preview Lab → · Contrast checker → · Palette generator →