#B63B33#B63B33

#B63B33 is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.9% C 0.160 H 27.6°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#B63B33
RGB	rgb(182, 59, 51)
HSL	hsl(4, 56%, 46%)
HSV	hsv(4, 72%, 71%)
CMYK	cmyk(0%, 67.6%, 72%, 28.6%)
CIE-LAB	lab(43.23, 49.12, 32.61)
CIE-LCH	lch(43.23, 58.96, 33.58°)
OKLab	oklab(52.95% 0.1421 0.0744)
OKLCH	oklch(52.95% 0.16 27.6)
XYZ	xyz(21.4552, 13.3151, 4.5717)
Luminance	0.1331 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63B33 #33AEB6

analogous

#B6336C #B63B33 #B67C33

triadic

#B63B33 #33B63B #3B33B6

tetradic

#B63B33 #6CB633 #33AEB6 #7C33B6

square

#B63B33 #6CB633 #33AEB6 #7C33B6

split-complementary

#B63B33 #33B67C #336CB6

monochromatic

#561C18 #862C26 #B63B33 #D05E56 #DD8C86

Accessibility & contrast

On white

5.73

#B63B33 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#B63B33 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63B33

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63B33	#FFFFFF	#000000	##FFFFFF
##B63B33	1.00	5.73	3.66	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5531

Deuteranopia (green-blind)

#7C702F

Tritanopia (blue-blind)

#C8183A

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63b33;
/* rgb */ color: rgb(182, 59, 51);
/* oklch */ color: oklch(52.9% 0.160 27.6);

Tailwind

colors: {
  custom: {
    50: '#d4786b',
    500: '#b63b33',
    950: '#000000',
  },
}

SCSS

$custom: #b63b33;
$custom-light: #d4786b;
$custom-dark: #000000;

JSON

{
  "hex": "#b63b33",
  "rgb": {
    "r": 182,
    "g": 59,
    "b": 51
  },
  "hsl": {
    "h": 3.664,
    "s": 56.223,
    "l": 45.686
  },
  "oklch": {
    "l": 0.52949,
    "c": 0.16034,
    "h": 27.6
  },
  "luminance": 0.13312
}

Semantic roles & 50–950 ramp

primary

#B63B33

secondary

#7EC2C7

accent

#D6E048

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B63B33

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

Preview Lab → · Contrast checker → · Palette generator →