#B63738#B63738

#B63738 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.6% C 0.164 H 24.3°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#B63738
RGB	rgb(182, 55, 56)
HSL	hsl(360, 54%, 46%)
HSV	hsv(360, 70%, 71%)
CMYK	cmyk(0%, 69.8%, 69.2%, 28.6%)
CIE-LAB	lab(42.71, 50.98, 29.05)
CIE-LCH	lch(42.71, 58.68, 29.67°)
OKLab	oklab(52.58% 0.149 0.0674)
OKLCH	oklch(52.58% 0.164 24.3)
XYZ	xyz(21.3737, 12.9661, 5.1179)
Luminance	0.1296 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63738 #37B6B5

analogous

#B63778 #B63738 #B67637

triadic

#B63738 #38B637 #3738B6

tetradic

#B63738 #78B637 #37B6B5 #7637B6

square

#B63738 #78B637 #37B6B5 #7637B6

split-complementary

#B63738 #37B676 #3778B6

monochromatic

#581B1B #87292A #B63738 #CE5C5D #DC8B8C

Accessibility & contrast

On white

5.85

#B63738 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#B63738 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63738

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63738	#FFFFFF	#000000	##FFFFFF
##B63738	1.00	5.85	3.59	5.85
#FFFFFF	5.85	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5337

Deuteranopia (green-blind)

#7A6F34

Tritanopia (blue-blind)

#C80F39

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b63738;
/* rgb */ color: rgb(182, 55, 56);
/* oklch */ color: oklch(52.6% 0.164 24.3);

Tailwind

colors: {
  custom: {
    50: '#d3766e',
    500: '#b63738',
    950: '#000000',
  },
}

SCSS

$custom: #b63738;
$custom-light: #d3766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b63738",
  "rgb": {
    "r": 182,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.528,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.5258,
    "c": 0.16353,
    "h": 24.3
  },
  "luminance": 0.12963
}

Semantic roles & 50–950 ramp

primary

#B63738

secondary

#82C6C6

accent

#DDDC4B

background

#FEF7F6

surface

#FCEDEC

border

#D5C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63738

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

Preview Lab → · Contrast checker → · Palette generator →