#B4373F#B4373F

#B4373F is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.4% C 0.161 H 21.2°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#B4373F
RGB	rgb(180, 55, 63)
HSL	hsl(356, 53%, 46%)
HSV	hsv(356, 69%, 71%)
CMYK	cmyk(0%, 69.4%, 65%, 29.4%)
CIE-LAB	lab(42.46, 50.72, 24.42)
CIE-LCH	lch(42.46, 56.30, 25.71°)
OKLab	oklab(52.36% 0.1499 0.0581)
OKLCH	oklch(52.36% 0.161 21.2)
XYZ	xyz(21.0880, 12.7976, 6.0614)
Luminance	0.1280 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4373F #37B4AC

analogous

#B4377D #B4373F #B46D37

triadic

#B4373F #3FB437 #373FB4

tetradic

#B4373F #7DB437 #37B4AC #6D37B4

square

#B4373F #7DB437 #37B4AC #6D37B4

split-complementary

#B4373F #37B46D #377DB4

monochromatic

#561A1E #85292F #B4373F #CD5B63 #DB8A8F

Accessibility & contrast

On white

5.90

#B4373F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B4373F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4373F

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4373F	#FFFFFF	#000000	##FFFFFF
##B4373F	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59533E

Deuteranopia (green-blind)

#786E3B

Tritanopia (blue-blind)

#C5143B

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b4373f;
/* rgb */ color: rgb(180, 55, 63);
/* oklch */ color: oklch(52.4% 0.161 21.2);

Tailwind

colors: {
  custom: {
    50: '#d27674',
    500: '#b4373f',
    950: '#000000',
  },
}

SCSS

$custom: #b4373f;
$custom-light: #d27674;
$custom-dark: #000000;

JSON

{
  "hex": "#b4373f",
  "rgb": {
    "r": 180,
    "g": 55,
    "b": 63
  },
  "hsl": {
    "h": 356.16,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.52358,
    "c": 0.16073,
    "h": 21.2
  },
  "luminance": 0.12795
}

Semantic roles & 50–950 ramp

primary

#B4373F

secondary

#81C6C1

accent

#DDD34B

background

#FDF7F7

surface

#FBEDED

border

#D4C8C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B4373F

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

Preview Lab → · Contrast checker → · Palette generator →