#B63B31#B63B31

#B63B31 is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.9% C 0.161 H 28.4°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#B63B31
RGB	rgb(182, 59, 49)
HSL	hsl(5, 58%, 45%)
HSV	hsv(5, 73%, 71%)
CMYK	cmyk(0%, 67.6%, 73.1%, 28.6%)
CIE-LAB	lab(43.21, 49.03, 33.74)
CIE-LCH	lch(43.21, 59.52, 34.54°)
OKLab	oklab(52.92% 0.1414 0.0764)
OKLCH	oklch(52.92% 0.161 28.4)
XYZ	xyz(21.4121, 13.2979, 4.3444)
Luminance	0.1330 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63B31 #31ACB6

analogous

#B6316A #B63B31 #B67D31

triadic

#B63B31 #31B63B #3B31B6

tetradic

#B63B31 #6AB631 #31ACB6 #7D31B6

square

#B63B31 #6AB631 #31ACB6 #7D31B6

split-complementary

#B63B31 #31B67D #316AB6

monochromatic

#561C17 #862B24 #B63B31 #D15D53 #DE8A84

Accessibility & contrast

On white

5.74

#B63B31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#B63B31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63B31

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63B31	#FFFFFF	#000000	##FFFFFF
##B63B31	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E552F

Deuteranopia (green-blind)

#7C702D

Tritanopia (blue-blind)

#C8173A

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63b31;
/* rgb */ color: rgb(182, 59, 49);
/* oklch */ color: oklch(52.9% 0.161 28.4);

Tailwind

colors: {
  custom: {
    50: '#d4786a',
    500: '#b63b31',
    950: '#000000',
  },
}

SCSS

$custom: #b63b31;
$custom-light: #d4786a;
$custom-dark: #000000;

JSON

{
  "hex": "#b63b31",
  "rgb": {
    "r": 182,
    "g": 59,
    "b": 49
  },
  "hsl": {
    "h": 4.511,
    "s": 57.576,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52921,
    "c": 0.16068,
    "h": 28.4
  },
  "luminance": 0.13295
}

Semantic roles & 50–950 ramp

primary

#B63B31

secondary

#7CC1C7

accent

#D5E147

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B63B31

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

Preview Lab → · Contrast checker → · Palette generator →