#BB3837#BB3837

#BB3837 is a mid, vivid red. Relative luminance 0.137; OKLCH L 53.5% C 0.168 H 25.2°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#BB3837
RGB	rgb(187, 56, 55)
HSL	hsl(0, 55%, 47%)
HSV	hsv(0, 71%, 73%)
CMYK	cmyk(0%, 70.1%, 70.6%, 26.7%)
CIE-LAB	lab(43.76, 52.18, 31.12)
CIE-LCH	lch(43.76, 60.75, 30.81°)
OKLab	oklab(53.53% 0.1519 0.0716)
OKLCH	oklch(53.53% 0.168 25.2)
XYZ	xyz(22.5997, 13.6723, 5.0627)
Luminance	0.1367 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3837 #37BABB

analogous

#BB3778 #BB3837 #BB7A37

triadic

#BB3837 #37BB38 #3837BB

tetradic

#BB3837 #78BB37 #37BABB #7A37BB

square

#BB3837 #78BB37 #37BABB #7A37BB

split-complementary

#BB3837 #37BB7A #3778BB

monochromatic

#5C1C1B #8C2A29 #BB3837 #D0605F #DE8F8E

Accessibility & contrast

On white

5.62

#BB3837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#BB3837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3837

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3837	#FFFFFF	#000000	##FFFFFF
##BB3837	1.00	5.62	3.73	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5536

Deuteranopia (green-blind)

#7E7233

Tritanopia (blue-blind)

#CE0B39

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3837;
/* rgb */ color: rgb(187, 56, 55);
/* oklch */ color: oklch(53.5% 0.168 25.2);

Tailwind

colors: {
  custom: {
    50: '#d7776e',
    500: '#bb3837',
    950: '#000000',
  },
}

SCSS

$custom: #bb3837;
$custom-light: #d7776e;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3837",
  "rgb": {
    "r": 187,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.455,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53527,
    "c": 0.16794,
    "h": 25.2
  },
  "luminance": 0.13669
}

Semantic roles & 50–950 ramp

primary

#BB3837

secondary

#85C8C9

accent

#DDDE4A

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #BB3837

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

Preview Lab → · Contrast checker → · Palette generator →