#B63A3A#B63A3A

#B63A3A is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.9% C 0.160 H 24.4°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#B63A3A
RGB	rgb(182, 58, 58)
HSL	hsl(0, 52%, 47%)
HSV	hsv(0, 68%, 71%)
CMYK	cmyk(0%, 68.1%, 68.1%, 28.6%)
CIE-LAB	lab(43.18, 49.89, 28.42)
CIE-LCH	lch(43.18, 57.42, 29.67°)
OKLab	oklab(52.94% 0.1459 0.0663)
OKLCH	oklch(52.94% 0.16 24.4)
XYZ	xyz(21.5705, 13.2798, 5.4296)
Luminance	0.1328 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63A3A #3AB6B6

analogous

#B63A78 #B63A3A #B6783A

triadic

#B63A3A #3AB63A #3A3AB6

tetradic

#B63A3A #78B63A #3AB6B6 #783AB6

square

#B63A3A #78B63A #3AB6B6 #783AB6

split-complementary

#B63A3A #3AB678 #3A78B6

monochromatic

#591C1C #882B2B #B63A3A #CD6161 #DB8F8F

Accessibility & contrast

On white

5.74

#B63A3A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#B63A3A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63A3A

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63A3A	#FFFFFF	#000000	##FFFFFF
##B63A3A	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)

#5C5539

Deuteranopia (green-blind)

#7B7036

Tritanopia (blue-blind)

#C8183B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63a3a;
/* rgb */ color: rgb(182, 58, 58);
/* oklch */ color: oklch(52.9% 0.160 24.4);

Tailwind

colors: {
  custom: {
    50: '#d37870',
    500: '#b63a3a',
    950: '#000000',
  },
}

SCSS

$custom: #b63a3a;
$custom-light: #d37870;
$custom-dark: #000000;

JSON

{
  "hex": "#b63a3a",
  "rgb": {
    "r": 182,
    "g": 58,
    "b": 58
  },
  "hsl": {
    "h": 0,
    "s": 51.667,
    "l": 47.059
  },
  "oklch": {
    "l": 0.52941,
    "c": 0.16031,
    "h": 24.4
  },
  "luminance": 0.13277
}

Semantic roles & 50–950 ramp

primary

#B63A3A

secondary

#86C6C6

accent

#DBDB4D

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63A3A

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

Preview Lab → · Contrast checker → · Palette generator →