#B4331B#B4331B

#B4331B is a mid, vivid red. Relative luminance 0.121; OKLCH L 51.5% C 0.170 H 32.7°. Best body text is #FFFFFF at 6.12:1 contrast (WCAG AA passes).

Color values

HEX	#B4331B
RGB	rgb(180, 51, 27)
HSL	hsl(9, 74%, 41%)
HSV	hsv(9, 85%, 71%)
CMYK	cmyk(0%, 71.7%, 85%, 29.4%)
CIE-LAB	lab(41.46, 50.75, 43.63)
CIE-LCH	lch(41.46, 66.93, 40.69°)
OKLab	oklab(51.47% 0.1427 0.0915)
OKLCH	oklch(51.47% 0.17 32.7)
XYZ	xyz(20.2065, 12.1532, 2.3185)
Luminance	0.1215 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4331B #1B9CB4

analogous

#B41B4F #B4331B #B47F1B

triadic

#B4331B #1BB433 #331BB4

tetradic

#B4331B #4FB41B #1B9CB4 #7F1BB4

square

#B4331B #4FB41B #1B9CB4 #7F1BB4

split-complementary

#B4331B #1BB47F #1B4FB4

monochromatic

#4A150B #7F2413 #B4331B #DF492D #E77762

Accessibility & contrast

On white

6.12

#B4331B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.43

#B4331B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4331B

6.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4331B	#FFFFFF	#000000	##FFFFFF
##B4331B	1.00	6.12	3.43	6.12
#FFFFFF	6.12	1.00	21.00	1.00
#000000	3.43	21.00	1.00	21.00
##FFFFFF	6.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5016

Deuteranopia (green-blind)

#7A6C13

Tritanopia (blue-blind)

#C7002F

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b4331b;
/* rgb */ color: rgb(180, 51, 27);
/* oklch */ color: oklch(51.5% 0.170 32.7);

Tailwind

colors: {
  custom: {
    50: '#d4735a',
    500: '#b4331b',
    950: '#000000',
  },
}

SCSS

$custom: #b4331b;
$custom-light: #d4735a;
$custom-dark: #000000;

JSON

{
  "hex": "#b4331b",
  "rgb": {
    "r": 180,
    "g": 51,
    "b": 27
  },
  "hsl": {
    "h": 9.412,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.51473,
    "c": 0.16952,
    "h": 32.7
  },
  "luminance": 0.1215
}

Semantic roles & 50–950 ramp

primary

#B4331B

secondary

#5FBBCC

accent

#D3F137

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B4331B

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

Preview Lab → · Contrast checker → · Palette generator →