#B13037#B13037

#B13037 is a mid, vivid red. Relative luminance 0.117; OKLCH L 51.0% C 0.165 H 22.5°. Best body text is #FFFFFF at 6.27:1 contrast (WCAG AA passes).

Color values

HEX	#B13037
RGB	rgb(177, 48, 55)
HSL	hsl(357, 57%, 44%)
HSV	hsv(357, 73%, 69%)
CMYK	cmyk(0%, 72.9%, 68.9%, 30.6%)
CIE-LAB	lab(40.80, 51.97, 27.12)
CIE-LCH	lch(40.80, 58.62, 27.55°)
OKLab	oklab(50.98% 0.1526 0.0632)
OKLCH	oklch(50.98% 0.165 22.5)
XYZ	xyz(19.8802, 11.7398, 4.8329)
Luminance	0.1174 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13037 #30B1AA

analogous

#B13078 #B13037 #B16A30

triadic

#B13037 #37B130 #3037B1

tetradic

#B13037 #78B130 #30B1AA #6A30B1

square

#B13037 #78B130 #30B1AA #6A30B1

split-complementary

#B13037 #30B16A #3078B1

monochromatic

#511619 #812328 #B13037 #CF4F56 #DC7F84

Accessibility & contrast

On white

6.27

#B13037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#B13037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13037

6.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13037	#FFFFFF	#000000	##FFFFFF
##B13037	1.00	6.27	3.35	6.27
#FFFFFF	6.27	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554F36

Deuteranopia (green-blind)

#756A33

Tritanopia (blue-blind)

#C30034

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b13037;
/* rgb */ color: rgb(177, 48, 55);
/* oklch */ color: oklch(51.0% 0.165 22.5);

Tailwind

colors: {
  custom: {
    50: '#d0726e',
    500: '#b13037',
    950: '#000000',
  },
}

SCSS

$custom: #b13037;
$custom-light: #d0726e;
$custom-dark: #000000;

JSON

{
  "hex": "#b13037",
  "rgb": {
    "r": 177,
    "g": 48,
    "b": 55
  },
  "hsl": {
    "h": 356.744,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50978,
    "c": 0.16513,
    "h": 22.5
  },
  "luminance": 0.11737
}

Semantic roles & 50–950 ramp

primary

#B13037

secondary

#78C5C1

accent

#E1D847

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150807

muted

#837B7A

Preview Lab

Preview with #B13037

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

Preview Lab → · Contrast checker → · Palette generator →