#B13731#B13731

#B13731 is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.6% C 0.159 H 27.0°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#B13731
RGB	rgb(177, 55, 49)
HSL	hsl(3, 57%, 44%)
HSV	hsv(3, 72%, 69%)
CMYK	cmyk(0%, 68.9%, 72.3%, 30.6%)
CIE-LAB	lab(41.70, 48.98, 31.77)
CIE-LCH	lch(41.70, 58.38, 32.97°)
OKLab	oklab(51.62% 0.1418 0.0724)
OKLCH	oklch(51.62% 0.159 27)
XYZ	xyz(20.0542, 12.3042, 4.2241)
Luminance	0.1230 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13731 #31ABB1

analogous

#B1316B #B13731 #B17731

triadic

#B13731 #31B137 #3731B1

tetradic

#B13731 #6BB131 #31ABB1 #7731B1

square

#B13731 #6BB131 #31ABB1 #7731B1

split-complementary

#B13731 #31B177 #316BB1

monochromatic

#511916 #812824 #B13731 #CF5651 #DC8580

Accessibility & contrast

On white

6.07

#B13731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#B13731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13731

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13731	#FFFFFF	#000000	##FFFFFF
##B13731	1.00	6.07	3.46	6.07
#FFFFFF	6.07	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59522F

Deuteranopia (green-blind)

#786C2D

Tritanopia (blue-blind)

#C31137

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b13731;
/* rgb */ color: rgb(177, 55, 49);
/* oklch */ color: oklch(51.6% 0.159 27.0);

Tailwind

colors: {
  custom: {
    50: '#d07569',
    500: '#b13731',
    950: '#000000',
  },
}

SCSS

$custom: #b13731;
$custom-light: #d07569;
$custom-dark: #000000;

JSON

{
  "hex": "#b13731",
  "rgb": {
    "r": 177,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.813,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.51619,
    "c": 0.1592,
    "h": 27
  },
  "luminance": 0.12301
}

Semantic roles & 50–950 ramp

primary

#B13731

secondary

#79C1C5

accent

#D9E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B13731

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

Preview Lab → · Contrast checker → · Palette generator →