#BB3937#BB3937

#BB3937 is a mid, vivid red. Relative luminance 0.138; OKLCH L 53.6% C 0.167 H 25.5°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#BB3937
RGB	rgb(187, 57, 55)
HSL	hsl(1, 55%, 47%)
HSV	hsv(1, 71%, 73%)
CMYK	cmyk(0%, 69.5%, 70.6%, 26.7%)
CIE-LAB	lab(43.90, 51.79, 31.28)
CIE-LCH	lch(43.90, 60.50, 31.14°)
OKLab	oklab(53.63% 0.1507 0.0719)
OKLCH	oklch(53.63% 0.167 25.5)
XYZ	xyz(22.6487, 13.7702, 5.0790)
Luminance	0.1377 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3937 #37B9BB

analogous

#BB3777 #BB3937 #BB7B37

triadic

#BB3937 #37BB39 #3937BB

tetradic

#BB3937 #77BB37 #37B9BB #7B37BB

square

#BB3937 #77BB37 #37B9BB #7B37BB

split-complementary

#BB3937 #37BB7B #3777BB

monochromatic

#5C1C1B #8C2B29 #BB3937 #D0615F #DE908E

Accessibility & contrast

On white

5.59

#BB3937 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#BB3937 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3937

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3937	#FFFFFF	#000000	##FFFFFF
##BB3937	1.00	5.59	3.75	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5636

Deuteranopia (green-blind)

#7E7233

Tritanopia (blue-blind)

#CE0F3A

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #bb3937;
/* rgb */ color: rgb(187, 57, 55);
/* oklch */ color: oklch(53.6% 0.167 25.5);

Tailwind

colors: {
  custom: {
    50: '#d7786e',
    500: '#bb3937',
    950: '#000000',
  },
}

SCSS

$custom: #bb3937;
$custom-light: #d7786e;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3937",
  "rgb": {
    "r": 187,
    "g": 57,
    "b": 55
  },
  "hsl": {
    "h": 0.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53634,
    "c": 0.16698,
    "h": 25.5
  },
  "luminance": 0.13767
}

Semantic roles & 50–950 ramp

primary

#BB3937

secondary

#85C8C9

accent

#DCDE4A

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #BB3937

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

Preview Lab → · Contrast checker → · Palette generator →