#B4281A#B4281A

#B4281A is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.4% C 0.178 H 30.1°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#B4281A
RGB	rgb(180, 40, 26)
HSL	hsl(5, 75%, 40%)
HSV	hsv(5, 86%, 71%)
CMYK	cmyk(0%, 77.8%, 85.6%, 29.4%)
CIE-LAB	lab(40.08, 54.53, 42.91)
CIE-LCH	lch(40.08, 69.39, 38.20°)
OKLab	oklab(50.44% 0.1543 0.0894)
OKLCH	oklch(50.44% 0.178 30.1)
XYZ	xyz(19.7701, 11.2987, 2.1170)
Luminance	0.1129 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4281A #1AA6B4

analogous

#B41A59 #B4281A #B4751A

triadic

#B4281A #1AB428 #281AB4

tetradic

#B4281A #59B41A #1AA6B4 #751AB4

square

#B4281A #59B41A #1AA6B4 #751AB4

split-complementary

#B4281A #1AB475 #1A59B4

monochromatic

#49100B #7F1C12 #B4281A #E03B2B #E86D60

Accessibility & contrast

On white

6.44

#B4281A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#B4281A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4281A

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4281A	#FFFFFF	#000000	##FFFFFF
##B4281A	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)

#544B16

Deuteranopia (green-blind)

#776911

Tritanopia (blue-blind)

#C70027

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #b4281a;
/* rgb */ color: rgb(180, 40, 26);
/* oklch */ color: oklch(50.4% 0.178 30.1);

Tailwind

colors: {
  custom: {
    50: '#d46e59',
    500: '#b4281a',
    950: '#000000',
  },
}

SCSS

$custom: #b4281a;
$custom-light: #d46e59;
$custom-dark: #000000;

JSON

{
  "hex": "#b4281a",
  "rgb": {
    "r": 180,
    "g": 40,
    "b": 26
  },
  "hsl": {
    "h": 5.455,
    "s": 74.757,
    "l": 40.392
  },
  "oklch": {
    "l": 0.50441,
    "c": 0.17832,
    "h": 30.1
  },
  "luminance": 0.11295
}

Semantic roles & 50–950 ramp

primary

#B4281A

secondary

#5DC2CC

accent

#E0F136

background

#FEF7F5

surface

#FDEDE9

border

#D5C8C5

text

#160804

muted

#847B79

Preview Lab

Preview with #B4281A

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

Preview Lab → · Contrast checker → · Palette generator →