#B4371A#B4371A

#B4371A is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.166 H 34.1°. Best body text is #FFFFFF at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#B4371A
RGB	rgb(180, 55, 26)
HSL	hsl(11, 75%, 40%)
HSV	hsv(11, 86%, 71%)
CMYK	cmyk(0%, 69.4%, 85.6%, 29.4%)
CIE-LAB	lab(42.02, 49.17, 44.59)
CIE-LCH	lch(42.02, 66.38, 42.21°)
OKLab	oklab(51.89% 0.1376 0.0933)
OKLCH	oklch(51.89% 0.166 34.1)
XYZ	xyz(20.3775, 12.5134, 2.3194)
Luminance	0.1251 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4371A #1A97B4

analogous

#B41A4A #B4371A #B4841A

triadic

#B4371A #1AB437 #371AB4

tetradic

#B4371A #4AB41A #1A97B4 #841AB4

square

#B4371A #4AB41A #1A97B4 #841AB4

split-complementary

#B4371A #1AB484 #1A4AB4

monochromatic

#49160B #7F2712 #B4371A #E04D2B #E87A60

Accessibility & contrast

On white

6.00

#B4371A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#B4371A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4371A

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4371A	#FFFFFF	#000000	##FFFFFF
##B4371A	1.00	6.00	3.50	6.00
#FFFFFF	6.00	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	6.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5115

Deuteranopia (green-blind)

#7B6D12

Tritanopia (blue-blind)

#C70432

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b4371a;
/* rgb */ color: rgb(180, 55, 26);
/* oklch */ color: oklch(51.9% 0.166 34.1);

Tailwind

colors: {
  custom: {
    50: '#d4755a',
    500: '#b4371a',
    950: '#000000',
  },
}

SCSS

$custom: #b4371a;
$custom-light: #d4755a;
$custom-dark: #000000;

JSON

{
  "hex": "#b4371a",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 26
  },
  "hsl": {
    "h": 11.299,
    "s": 74.757,
    "l": 40.392
  },
  "oklch": {
    "l": 0.51892,
    "c": 0.16627,
    "h": 34.1
  },
  "luminance": 0.1251
}

Semantic roles & 50–950 ramp

primary

#B4371A

secondary

#5DB8CC

accent

#CEF136

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B4371A

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

Preview Lab → · Contrast checker → · Palette generator →