#B63739#B63739

#B63739 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.6% C 0.163 H 23.9°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#B63739
RGB	rgb(182, 55, 57)
HSL	hsl(359, 54%, 46%)
HSV	hsv(359, 70%, 71%)
CMYK	cmyk(0%, 69.8%, 68.7%, 28.6%)
CIE-LAB	lab(42.73, 51.04, 28.47)
CIE-LCH	lch(42.73, 58.44, 29.15°)
OKLab	oklab(52.6% 0.1494 0.0663)
OKLCH	oklch(52.6% 0.163 23.9)
XYZ	xyz(21.3984, 12.9760, 5.2480)
Luminance	0.1297 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63739 #37B6B4

analogous

#B63779 #B63739 #B67537

triadic

#B63739 #39B637 #3739B6

tetradic

#B63739 #79B637 #37B6B4 #7537B6

square

#B63739 #79B637 #37B6B4 #7537B6

split-complementary

#B63739 #37B675 #3779B6

monochromatic

#581B1C #87292A #B63739 #CE5C5E #DC8B8D

Accessibility & contrast

On white

5.84

#B63739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#B63739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63739

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63739	#FFFFFF	#000000	##FFFFFF
##B63739	1.00	5.84	3.59	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A5438

Deuteranopia (green-blind)

#7A6F35

Tritanopia (blue-blind)

#C80F39

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b63739;
/* rgb */ color: rgb(182, 55, 57);
/* oklch */ color: oklch(52.6% 0.163 23.9);

Tailwind

colors: {
  custom: {
    50: '#d3766f',
    500: '#b63739',
    950: '#000000',
  },
}

SCSS

$custom: #b63739;
$custom-light: #d3766f;
$custom-dark: #000000;

JSON

{
  "hex": "#b63739",
  "rgb": {
    "r": 182,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.055,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.52596,
    "c": 0.16342,
    "h": 23.9
  },
  "luminance": 0.12973
}

Semantic roles & 50–950 ramp

primary

#B63739

secondary

#82C6C5

accent

#DDDB4B

background

#FEF7F6

surface

#FCEDEC

border

#D5C8C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #B63739

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

Preview Lab → · Contrast checker → · Palette generator →