#BB3137#BB3137

#BB3137 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.8% C 0.174 H 23.4°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#BB3137
RGB	rgb(187, 49, 55)
HSL	hsl(357, 58%, 46%)
HSV	hsv(357, 74%, 73%)
CMYK	cmyk(0%, 73.8%, 70.6%, 26.7%)
CIE-LAB	lab(42.82, 54.76, 30.01)
CIE-LCH	lch(42.82, 62.44, 28.72°)
OKLab	oklab(52.83% 0.1601 0.0691)
OKLCH	oklch(52.83% 0.174 23.4)
XYZ	xyz(22.2839, 13.0406, 4.9574)
Luminance	0.1304 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3137 #31BBB5

analogous

#BB317C #BB3137 #BB7031

triadic

#BB3137 #37BB31 #3137BB

tetradic

#BB3137 #7CBB31 #31BBB5 #7031BB

square

#BB3137 #7CBB31 #31BBB5 #7031BB

split-complementary

#BB3137 #31BB70 #317CBB

monochromatic

#5A181A #8B2429 #BB3137 #D3565C #E0878B

Accessibility & contrast

On white

5.82

#BB3137 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#BB3137 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3137

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3137	#FFFFFF	#000000	##FFFFFF
##BB3137	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595236

Deuteranopia (green-blind)

#7C7032

Tritanopia (blue-blind)

#CE0035

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #bb3137;
/* rgb */ color: rgb(187, 49, 55);
/* oklch */ color: oklch(52.8% 0.174 23.4);

Tailwind

colors: {
  custom: {
    50: '#d8746e',
    500: '#bb3137',
    950: '#000000',
  },
}

SCSS

$custom: #bb3137;
$custom-light: #d8746e;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3137",
  "rgb": {
    "r": 187,
    "g": 49,
    "b": 55
  },
  "hsl": {
    "h": 357.391,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.5283,
    "c": 0.17439,
    "h": 23.4
  },
  "luminance": 0.13037
}

Semantic roles & 50–950 ramp

primary

#BB3137

secondary

#7FC9C6

accent

#E2DB46

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #BB3137

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

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