#B4173B#B4173B

#B4173B is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.7% C 0.187 H 16.6°. Best body text is #FFFFFF at 6.72:1 contrast (WCAG AA passes).

Color values

HEX	#B4173B
RGB	rgb(180, 23, 59)
HSL	hsl(346, 77%, 40%)
HSV	hsv(346, 87%, 71%)
CMYK	cmyk(0%, 87.2%, 67.2%, 29.4%)
CIE-LAB	lab(38.96, 60.11, 22.47)
CIE-LCH	lch(38.96, 64.17, 20.50°)
OKLab	oklab(49.74% 0.1791 0.0532)
OKLCH	oklch(49.74% 0.187 16.6)
XYZ	xyz(19.9205, 10.6350, 5.1407)
Luminance	0.1063 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4173B #17B490

analogous

#B4178A #B4173B #B44117

triadic

#B4173B #3BB417 #173BB4

tetradic

#B4173B #8AB417 #17B490 #4117B4

square

#B4173B #8AB417 #17B490 #4117B4

split-complementary

#B4173B #17B441 #178AB4

monochromatic

#470917 #7E1029 #B4173B #E32551 #EA5B7C

Accessibility & contrast

On white

6.72

#B4173B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#B4173B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4173B

6.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4173B	#FFFFFF	#000000	##FFFFFF
##B4173B	1.00	6.72	3.13	6.72
#FFFFFF	6.72	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B473B

Deuteranopia (green-blind)

#716736

Tritanopia (blue-blind)

#C60028

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b4173b;
/* rgb */ color: rgb(180, 23, 59);
/* oklch */ color: oklch(49.7% 0.187 16.6);

Tailwind

colors: {
  custom: {
    50: '#d36970',
    500: '#b4173b',
    950: '#000000',
  },
}

SCSS

$custom: #b4173b;
$custom-light: #d36970;
$custom-dark: #000000;

JSON

{
  "hex": "#b4173b",
  "rgb": {
    "r": 180,
    "g": 23,
    "b": 59
  },
  "hsl": {
    "h": 346.242,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.49741,
    "c": 0.18683,
    "h": 16.6
  },
  "luminance": 0.10632
}

Semantic roles & 50–950 ramp

primary

#B4173B

secondary

#59CEB3

accent

#F4C834

background

#FEF6F6

surface

#FCECEC

border

#D5C7C7

text

#160707

muted

#847A7A

Preview Lab

Preview with #B4173B

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

Preview Lab → · Contrast checker → · Palette generator →