#B4173A#B4173A

#B4173A is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.7% C 0.187 H 17.0°. Best body text is #FFFFFF at 6.72:1 contrast (WCAG AA passes).

Color values

HEX	#B4173A
RGB	rgb(180, 23, 58)
HSL	hsl(347, 77%, 40%)
HSV	hsv(347, 87%, 71%)
CMYK	cmyk(0%, 87.2%, 67.8%, 29.4%)
CIE-LAB	lab(38.94, 60.06, 23.08)
CIE-LCH	lch(38.94, 64.34, 21.02°)
OKLab	oklab(49.72% 0.1787 0.0545)
OKLCH	oklch(49.72% 0.187 17)
XYZ	xyz(19.8948, 10.6248, 5.0054)
Luminance	0.1062 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4173A #17B491

analogous

#B41789 #B4173A #B44217

triadic

#B4173A #3AB417 #173AB4

tetradic

#B4173A #89B417 #17B491 #4217B4

square

#B4173A #89B417 #17B491 #4217B4

split-complementary

#B4173A #17B442 #1789B4

monochromatic

#470917 #7E1029 #B4173A #E3254F #EA5B7B

Accessibility & contrast

On white

6.72

#B4173A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B4173A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4173A

6.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4173A	#FFFFFF	#000000	##FFFFFF
##B4173A	1.00	6.72	3.12	6.72
#FFFFFF	6.72	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.72	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: #b4173a;
/* rgb */ color: rgb(180, 23, 58);
/* oklch */ color: oklch(49.7% 0.187 17.0);

Tailwind

colors: {
  custom: {
    50: '#d3696f',
    500: '#b4173a',
    950: '#000000',
  },
}

SCSS

$custom: #b4173a;
$custom-light: #d3696f;
$custom-dark: #000000;

JSON

{
  "hex": "#b4173a",
  "rgb": {
    "r": 180,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 346.624,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.49722,
    "c": 0.18682,
    "h": 17
  },
  "luminance": 0.10622
}

Semantic roles & 50–950 ramp

primary

#B4173A

secondary

#59CEB4

accent

#F4C934

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160707

muted

#847A7A

Preview Lab

Preview with #B4173A

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

Preview Lab → · Contrast checker → · Palette generator →