#B83738#B83738

#B83738 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.9% C 0.166 H 24.4°. Best body text is #FFFFFF at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#B83738
RGB	rgb(184, 55, 56)
HSL	hsl(360, 54%, 47%)
HSV	hsv(360, 70%, 72%)
CMYK	cmyk(0%, 70.1%, 69.6%, 27.8%)
CIE-LAB	lab(43.08, 51.64, 29.58)
CIE-LCH	lch(43.08, 59.51, 29.81°)
OKLab	oklab(52.92% 0.1508 0.0685)
OKLCH	oklch(52.92% 0.166 24.4)
XYZ	xyz(21.8495, 13.2115, 5.1402)
Luminance	0.1321 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B83738 #37B8B7

analogous

#B83779 #B83738 #B87737

triadic

#B83738 #38B837 #3738B8

tetradic

#B83738 #79B837 #37B8B7 #7737B8

square

#B83738 #79B837 #37B8B7 #7737B8

split-complementary

#B83738 #37B877 #3779B8

monochromatic

#5A1B1B #89292A #B83738 #CF5D5E #DD8D8D

Accessibility & contrast

On white

5.77

#B83738 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#B83738 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B83738

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B83738	#FFFFFF	#000000	##FFFFFF
##B83738	1.00	5.77	3.64	5.77
#FFFFFF	5.77	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5437

Deuteranopia (green-blind)

#7C7034

Tritanopia (blue-blind)

#CA0C39

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b83738;
/* rgb */ color: rgb(184, 55, 56);
/* oklch */ color: oklch(52.9% 0.166 24.4);

Tailwind

colors: {
  custom: {
    50: '#d5766e',
    500: '#b83738',
    950: '#000000',
  },
}

SCSS

$custom: #b83738;
$custom-light: #d5766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b83738",
  "rgb": {
    "r": 184,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.535,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.52923,
    "c": 0.16564,
    "h": 24.4
  },
  "luminance": 0.13208
}

Semantic roles & 50–950 ramp

primary

#B83738

secondary

#84C7C7

accent

#DDDC4A

background

#FEF7F6

surface

#FCEDEC

border

#D5C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B83738

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

Preview Lab → · Contrast checker → · Palette generator →