#B3231A#B3231A

#B3231A is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.9% C 0.181 H 29.1°. Best body text is #FFFFFF at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#B3231A
RGB	rgb(179, 35, 26)
HSL	hsl(4, 75%, 40%)
HSV	hsv(4, 85%, 70%)
CMYK	cmyk(0%, 80.4%, 85.5%, 29.8%)
CIE-LAB	lab(39.35, 55.72, 42.19)
CIE-LCH	lch(39.35, 69.89, 37.14°)
OKLab	oklab(49.86% 0.1581 0.0879)
OKLCH	oklch(49.86% 0.181 29.1)
XYZ	xyz(19.3803, 10.8635, 2.0535)
Luminance	0.1086 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3231A #1AAAB3

analogous

#B31A5E #B3231A #B36F1A

triadic

#B3231A #1AB323 #231AB3

tetradic

#B3231A #5EB31A #1AAAB3 #6F1AB3

square

#B3231A #5EB31A #1AAAB3 #6F1AB3

split-complementary

#B3231A #1AB36F #1A5EB3

monochromatic

#480E0A #7E1912 #B3231A #E0352A #E86860

Accessibility & contrast

On white

6.62

#B3231A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#B3231A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B3231A

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3231A	#FFFFFF	#000000	##FFFFFF
##B3231A	1.00	6.62	3.17	6.62
#FFFFFF	6.62	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#524917

Deuteranopia (green-blind)

#756811

Tritanopia (blue-blind)

#C60023

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #b3231a;
/* rgb */ color: rgb(179, 35, 26);
/* oklch */ color: oklch(49.9% 0.181 29.1);

Tailwind

colors: {
  custom: {
    50: '#d46c59',
    500: '#b3231a',
    950: '#000000',
  },
}

SCSS

$custom: #b3231a;
$custom-light: #d46c59;
$custom-dark: #000000;

JSON

{
  "hex": "#b3231a",
  "rgb": {
    "r": 179,
    "g": 35,
    "b": 26
  },
  "hsl": {
    "h": 3.529,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.49863,
    "c": 0.18088,
    "h": 29.1
  },
  "luminance": 0.1086
}

Semantic roles & 50–950 ramp

primary

#B3231A

secondary

#5DC6CC

accent

#E6F137

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160803

muted

#847A78

Preview Lab

Preview with #B3231A

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

Preview Lab → · Contrast checker → · Palette generator →