#B13737#B13737

#B13737 is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.7% C 0.158 H 24.6°. Best body text is #FFFFFF at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#B13737
RGB	rgb(177, 55, 55)
HSL	hsl(0, 53%, 45%)
HSV	hsv(0, 69%, 69%)
CMYK	cmyk(0%, 68.9%, 68.9%, 30.6%)
CIE-LAB	lab(41.78, 49.28, 28.31)
CIE-LCH	lch(41.78, 56.83, 29.87°)
OKLab	oklab(51.71% 0.144 0.0658)
OKLCH	oklch(51.71% 0.158 24.6)
XYZ	xyz(20.1894, 12.3583, 4.9360)
Luminance	0.1235 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13737 #37B1B1

analogous

#B13774 #B13737 #B17437

triadic

#B13737 #37B137 #3737B1

tetradic

#B13737 #74B137 #37B1B1 #7437B1

square

#B13737 #74B137 #37B1B1 #7437B1

split-complementary

#B13737 #37B174 #3774B1

monochromatic

#541A1A #822828 #B13737 #CC5A5A #DA8888

Accessibility & contrast

On white

6.05

#B13737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#B13737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13737

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13737	#FFFFFF	#000000	##FFFFFF
##B13737	1.00	6.05	3.47	6.05
#FFFFFF	6.05	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595236

Deuteranopia (green-blind)

#776C33

Tritanopia (blue-blind)

#C21338

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b13737;
/* rgb */ color: rgb(177, 55, 55);
/* oklch */ color: oklch(51.7% 0.158 24.6);

Tailwind

colors: {
  custom: {
    50: '#d0756e',
    500: '#b13737',
    950: '#000000',
  },
}

SCSS

$custom: #b13737;
$custom-light: #d0756e;
$custom-dark: #000000;

JSON

{
  "hex": "#b13737",
  "rgb": {
    "r": 177,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.51709,
    "c": 0.15835,
    "h": 24.6
  },
  "luminance": 0.12355
}

Semantic roles & 50–950 ramp

primary

#B13737

secondary

#80C4C4

accent

#DCDC4C

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B13737

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

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