#B63A37#B63A37

#B63A37 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.9% C 0.161 H 25.7°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#B63A37
RGB	rgb(182, 58, 55)
HSL	hsl(1, 54%, 46%)
HSV	hsv(1, 70%, 71%)
CMYK	cmyk(0%, 68.1%, 69.8%, 28.6%)
CIE-LAB	lab(43.14, 49.73, 30.15)
CIE-LCH	lch(43.14, 58.16, 31.23°)
OKLab	oklab(52.89% 0.1448 0.0697)
OKLCH	oklch(52.89% 0.161 25.7)
XYZ	xyz(21.4963, 13.2501, 5.0393)
Luminance	0.1325 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63A37 #37B3B6

analogous

#B63774 #B63A37 #B67A37

triadic

#B63A37 #37B63A #3A37B6

tetradic

#B63A37 #74B637 #37B3B6 #7A37B6

square

#B63A37 #74B637 #37B3B6 #7A37B6

split-complementary

#B63A37 #37B67A #3774B6

monochromatic

#581C1B #872B29 #B63A37 #CE5F5C #DC8D8B

Accessibility & contrast

On white

5.75

#B63A37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#B63A37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63A37

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63A37	#FFFFFF	#000000	##FFFFFF
##B63A37	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5536

Deuteranopia (green-blind)

#7B7033

Tritanopia (blue-blind)

#C8173B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63a37;
/* rgb */ color: rgb(182, 58, 55);
/* oklch */ color: oklch(52.9% 0.161 25.7);

Tailwind

colors: {
  custom: {
    50: '#d3776e',
    500: '#b63a37',
    950: '#000000',
  },
}

SCSS

$custom: #b63a37;
$custom-light: #d3776e;
$custom-dark: #000000;

JSON

{
  "hex": "#b63a37",
  "rgb": {
    "r": 182,
    "g": 58,
    "b": 55
  },
  "hsl": {
    "h": 1.417,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.52894,
    "c": 0.16072,
    "h": 25.7
  },
  "luminance": 0.13247
}

Semantic roles & 50–950 ramp

primary

#B63A37

secondary

#82C5C6

accent

#DADD4B

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63A37

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

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