#BB3537#BB3537

#BB3537 is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.2% C 0.171 H 24.4°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#BB3537
RGB	rgb(187, 53, 55)
HSL	hsl(359, 56%, 47%)
HSV	hsv(359, 72%, 73%)
CMYK	cmyk(0%, 71.7%, 70.6%, 26.7%)
CIE-LAB	lab(43.35, 53.31, 30.62)
CIE-LCH	lch(43.35, 61.48, 29.87°)
OKLab	oklab(53.22% 0.1555 0.0705)
OKLCH	oklch(53.22% 0.171 24.4)
XYZ	xyz(22.4587, 13.3902, 5.0157)
Luminance	0.1339 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3537 #35BBB9

analogous

#BB357A #BB3537 #BB7635

triadic

#BB3537 #37BB35 #3537BB

tetradic

#BB3537 #7ABB35 #35BBB9 #7635BB

square

#BB3537 #7ABB35 #35BBB9 #7635BB

split-complementary

#BB3537 #35BB76 #357ABB

monochromatic

#5C1A1B #8B2729 #BB3537 #D15C5E #DE8C8D

Accessibility & contrast

On white

5.71

#BB3537 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#BB3537 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3537

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3537	#FFFFFF	#000000	##FFFFFF
##BB3537	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5436

Deuteranopia (green-blind)

#7D7133

Tritanopia (blue-blind)

#CE0037

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #bb3537;
/* rgb */ color: rgb(187, 53, 55);
/* oklch */ color: oklch(53.2% 0.171 24.4);

Tailwind

colors: {
  custom: {
    50: '#d7766e',
    500: '#bb3537',
    950: '#000000',
  },
}

SCSS

$custom: #bb3537;
$custom-light: #d7766e;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3537",
  "rgb": {
    "r": 187,
    "g": 53,
    "b": 55
  },
  "hsl": {
    "h": 359.104,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.53218,
    "c": 0.17076,
    "h": 24.4
  },
  "luminance": 0.13387
}

Semantic roles & 50–950 ramp

primary

#BB3537

secondary

#83C9C8

accent

#DFDD49

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160907

muted

#847B7A

Preview Lab

Preview with #BB3537

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

Preview Lab → · Contrast checker → · Palette generator →