#B4281C#B4281C

#B4281C is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.5% C 0.178 H 29.6°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#B4281C
RGB	rgb(180, 40, 28)
HSL	hsl(5, 73%, 41%)
HSV	hsv(5, 84%, 71%)
CMYK	cmyk(0%, 77.8%, 84.4%, 29.4%)
CIE-LAB	lab(40.09, 54.58, 41.92)
CIE-LCH	lch(40.09, 68.82, 37.53°)
OKLab	oklab(50.46% 0.1548 0.088)
OKLCH	oklch(50.46% 0.178 29.6)
XYZ	xyz(19.7932, 11.3079, 2.2389)
Luminance	0.1130 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4281C #1CA8B4

analogous

#B41C5C #B4281C #B4741C

triadic

#B4281C #1CB428 #281CB4

tetradic

#B4281C #5CB41C #1CA8B4 #741CB4

square

#B4281C #5CB41C #1CA8B4 #741CB4

split-complementary

#B4281C #1CB474 #1C5CB4

monochromatic

#4A100C #7F1C14 #B4281C #DF3D2F #E76E64

Accessibility & contrast

On white

6.44

#B4281C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#B4281C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4281C

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4281C	#FFFFFF	#000000	##FFFFFF
##B4281C	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544B18

Deuteranopia (green-blind)

#776914

Tritanopia (blue-blind)

#C70027

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #b4281c;
/* rgb */ color: rgb(180, 40, 28);
/* oklch */ color: oklch(50.5% 0.178 29.6);

Tailwind

colors: {
  custom: {
    50: '#d46e5a',
    500: '#b4281c',
    950: '#000000',
  },
}

SCSS

$custom: #b4281c;
$custom-light: #d46e5a;
$custom-dark: #000000;

JSON

{
  "hex": "#b4281c",
  "rgb": {
    "r": 180,
    "g": 40,
    "b": 28
  },
  "hsl": {
    "h": 4.737,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.50457,
    "c": 0.17808,
    "h": 29.6
  },
  "luminance": 0.11305
}

Semantic roles & 50–950 ramp

primary

#B4281C

secondary

#60C3CC

accent

#E1F038

background

#FEF7F5

surface

#FDEDE9

border

#D5C8C5

text

#160804

muted

#847B79

Preview Lab

Preview with #B4281C

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

Preview Lab → · Contrast checker → · Palette generator →