#B13031#B13031

#B13031 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.9% C 0.166 H 24.9°. Best body text is #FFFFFF at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#B13031
RGB	rgb(177, 48, 49)
HSL	hsl(360, 57%, 44%)
HSV	hsv(360, 73%, 69%)
CMYK	cmyk(0%, 72.9%, 72.3%, 30.6%)
CIE-LAB	lab(40.71, 51.68, 30.63)
CIE-LCH	lch(40.71, 60.07, 30.66°)
OKLab	oklab(50.89% 0.1503 0.0699)
OKLCH	oklch(50.89% 0.166 24.9)
XYZ	xyz(19.7450, 11.6858, 4.1210)
Luminance	0.1168 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13031 #30B1B0

analogous

#B13072 #B13031 #B17030

triadic

#B13031 #31B130 #3031B1

tetradic

#B13031 #72B130 #30B1B0 #7030B1

square

#B13031 #72B130 #30B1B0 #7030B1

split-complementary

#B13031 #30B170 #3072B1

monochromatic

#511616 #812324 #B13031 #CF4F50 #DC7F80

Accessibility & contrast

On white

6.29

#B13031 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#B13031 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13031

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13031	#FFFFFF	#000000	##FFFFFF
##B13031	1.00	6.29	3.34	6.29
#FFFFFF	6.29	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554E30

Deuteranopia (green-blind)

#766A2D

Tritanopia (blue-blind)

#C30032

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b13031;
/* rgb */ color: rgb(177, 48, 49);
/* oklch */ color: oklch(50.9% 0.166 24.9);

Tailwind

colors: {
  custom: {
    50: '#d07269',
    500: '#b13031',
    950: '#000000',
  },
}

SCSS

$custom: #b13031;
$custom-light: #d07269;
$custom-dark: #000000;

JSON

{
  "hex": "#b13031",
  "rgb": {
    "r": 177,
    "g": 48,
    "b": 49
  },
  "hsl": {
    "h": 359.535,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50885,
    "c": 0.16577,
    "h": 24.9
  },
  "luminance": 0.11683
}

Semantic roles & 50–950 ramp

primary

#B13031

secondary

#78C5C5

accent

#E1DF47

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150806

muted

#837B7A

Preview Lab

Preview with #B13031

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

Preview Lab → · Contrast checker → · Palette generator →