#B63731#B63731

#B63731 is a mid, vivid red. Relative luminance 0.129; OKLCH L 52.5% C 0.164 H 27.1°. Best body text is #FFFFFF at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#B63731
RGB	rgb(182, 55, 49)
HSL	hsl(3, 58%, 45%)
HSV	hsv(3, 73%, 71%)
CMYK	cmyk(0%, 69.8%, 73.1%, 28.6%)
CIE-LAB	lab(42.62, 50.64, 33.07)
CIE-LCH	lch(42.62, 60.48, 33.14°)
OKLab	oklab(52.48% 0.1464 0.0749)
OKLCH	oklch(52.48% 0.164 27.1)
XYZ	xyz(21.2143, 12.9024, 4.2785)
Luminance	0.1290 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63731 #31B0B6

analogous

#B6316D #B63731 #B67A31

triadic

#B63731 #31B637 #3731B6

tetradic

#B63731 #6DB631 #31B0B6 #7A31B6

square

#B63731 #6DB631 #31B0B6 #7A31B6

split-complementary

#B63731 #31B67A #316DB6

monochromatic

#561A17 #862824 #B63731 #D15953 #DE8884

Accessibility & contrast

On white

5.87

#B63731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#B63731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63731

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63731	#FFFFFF	#000000	##FFFFFF
##B63731	1.00	5.87	3.58	5.87
#FFFFFF	5.87	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B532F

Deuteranopia (green-blind)

#7B6F2D

Tritanopia (blue-blind)

#C80B37

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b63731;
/* rgb */ color: rgb(182, 55, 49);
/* oklch */ color: oklch(52.5% 0.164 27.1);

Tailwind

colors: {
  custom: {
    50: '#d47669',
    500: '#b63731',
    950: '#000000',
  },
}

SCSS

$custom: #b63731;
$custom-light: #d47669;
$custom-dark: #000000;

JSON

{
  "hex": "#b63731",
  "rgb": {
    "r": 182,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.707,
    "s": 57.576,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52477,
    "c": 0.16449,
    "h": 27.1
  },
  "luminance": 0.12899
}

Semantic roles & 50–950 ramp

primary

#B63731

secondary

#7CC4C7

accent

#DAE147

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B63731

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

Preview Lab → · Contrast checker → · Palette generator →