#BB3731#BB3731

#BB3731 is a mid, vivid red. Relative luminance 0.135; OKLCH L 53.3% C 0.170 H 27.2°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#BB3731
RGB	rgb(187, 55, 49)
HSL	hsl(3, 58%, 46%)
HSV	hsv(3, 74%, 73%)
CMYK	cmyk(0%, 70.6%, 73.8%, 26.7%)
CIE-LAB	lab(43.54, 52.28, 34.36)
CIE-LCH	lch(43.54, 62.57, 33.32°)
OKLab	oklab(53.34% 0.151 0.0775)
OKLCH	oklch(53.34% 0.17 27.2)
XYZ	xyz(22.4166, 13.5223, 4.3348)
Luminance	0.1352 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3731 #31B5BB

analogous

#BB3170 #BB3731 #BB7C31

triadic

#BB3731 #31BB37 #3731BB

tetradic

#BB3731 #70BB31 #31B5BB #7C31BB

square

#BB3731 #70BB31 #31B5BB #7C31BB

split-complementary

#BB3731 #31BB7C #3170BB

monochromatic

#5A1A18 #8B2924 #BB3731 #D35C56 #E08B87

Accessibility & contrast

On white

5.67

#BB3731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#BB3731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3731

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3731	#FFFFFF	#000000	##FFFFFF
##BB3731	1.00	5.67	3.70	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D552F

Deuteranopia (green-blind)

#7E712C

Tritanopia (blue-blind)

#CE0437

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3731;
/* rgb */ color: rgb(187, 55, 49);
/* oklch */ color: oklch(53.3% 0.170 27.2);

Tailwind

colors: {
  custom: {
    50: '#d87669',
    500: '#bb3731',
    950: '#000000',
  },
}

SCSS

$custom: #bb3731;
$custom-light: #d87669;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3731",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.609,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.53338,
    "c": 0.16971,
    "h": 27.2
  },
  "luminance": 0.13519
}

Semantic roles & 50–950 ramp

primary

#BB3731

secondary

#7FC6C9

accent

#DBE246

background

#FEF7F6

surface

#FDEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #BB3731

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

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