#B3373B#B3373B

#B3373B is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.1% C 0.160 H 22.9°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#B3373B
RGB	rgb(179, 55, 59)
HSL	hsl(358, 53%, 46%)
HSV	hsv(358, 69%, 70%)
CMYK	cmyk(0%, 69.3%, 67%, 29.8%)
CIE-LAB	lab(42.21, 50.16, 26.50)
CIE-LCH	lch(42.21, 56.73, 27.85°)
OKLab	oklab(52.12% 0.1474 0.0623)
OKLCH	oklch(52.12% 0.16 22.9)
XYZ	xyz(20.7482, 12.6348, 5.4831)
Luminance	0.1263 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3373B #37B3AF

analogous

#B33779 #B3373B #B37137

triadic

#B3373B #3BB337 #373BB3

tetradic

#B3373B #79B337 #37B3AF #7137B3

square

#B3373B #79B337 #37B3AF #7137B3

split-complementary

#B3373B #37B371 #3779B3

monochromatic

#551A1C #84292C #B3373B #CD5B5E #DB8A8C

Accessibility & contrast

On white

5.96

#B3373B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#B3373B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B3373B

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3373B	#FFFFFF	#000000	##FFFFFF
##B3373B	1.00	5.96	3.53	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59533A

Deuteranopia (green-blind)

#786D37

Tritanopia (blue-blind)

#C5133A

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b3373b;
/* rgb */ color: rgb(179, 55, 59);
/* oklch */ color: oklch(52.1% 0.160 22.9);

Tailwind

colors: {
  custom: {
    50: '#d17671',
    500: '#b3373b',
    950: '#000000',
  },
}

SCSS

$custom: #b3373b;
$custom-light: #d17671;
$custom-dark: #000000;

JSON

{
  "hex": "#b3373b",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 59
  },
  "hsl": {
    "h": 358.065,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52117,
    "c": 0.16003,
    "h": 22.9
  },
  "luminance": 0.12632
}

Semantic roles & 50–950 ramp

primary

#B3373B

secondary

#81C5C3

accent

#DCD84B

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B3373B

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

Preview Lab → · Contrast checker → · Palette generator →