#B4183A#B4183A

#B4183A is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.8% C 0.186 H 17.1°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#B4183A
RGB	rgb(180, 24, 58)
HSL	hsl(347, 76%, 40%)
HSV	hsv(347, 87%, 71%)
CMYK	cmyk(0%, 86.7%, 67.8%, 29.4%)
CIE-LAB	lab(39.01, 59.86, 23.17)
CIE-LCH	lch(39.01, 64.19, 21.16°)
OKLab	oklab(49.77% 0.1781 0.0547)
OKLCH	oklch(49.77% 0.186 17.1)
XYZ	xyz(19.9150, 10.6652, 5.0122)
Luminance	0.1066 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4183A #18B492

analogous

#B41888 #B4183A #B44418

triadic

#B4183A #3AB418 #183AB4

tetradic

#B4183A #88B418 #18B492 #4418B4

square

#B4183A #88B418 #18B492 #4418B4

split-complementary

#B4183A #18B444 #1888B4

monochromatic

#480A17 #7E1129 #B4183A #E22750 #E95D7C

Accessibility & contrast

On white

6.70

#B4183A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#B4183A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4183A

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4183A	#FFFFFF	#000000	##FFFFFF
##B4183A	1.00	6.70	3.13	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B473A

Deuteranopia (green-blind)

#716735

Tritanopia (blue-blind)

#C60028

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b4183a;
/* rgb */ color: rgb(180, 24, 58);
/* oklch */ color: oklch(49.8% 0.186 17.1);

Tailwind

colors: {
  custom: {
    50: '#d36a6f',
    500: '#b4183a',
    950: '#000000',
  },
}

SCSS

$custom: #b4183a;
$custom-light: #d36a6f;
$custom-dark: #000000;

JSON

{
  "hex": "#b4183a",
  "rgb": {
    "r": 180,
    "g": 24,
    "b": 58
  },
  "hsl": {
    "h": 346.923,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.49774,
    "c": 0.18626,
    "h": 17.1
  },
  "luminance": 0.10662
}

Semantic roles & 50–950 ramp

primary

#B4183A

secondary

#5BCDB4

accent

#F3CA35

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160707

muted

#847A7A

Preview Lab

Preview with #B4183A

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

Preview Lab → · Contrast checker → · Palette generator →