#BB3740#BB3740

#BB3740 is a mid, vivid red. Relative luminance 0.137; OKLCH L 53.6% C 0.168 H 21.3°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#BB3740
RGB	rgb(187, 55, 64)
HSL	hsl(356, 55%, 47%)
HSV	hsv(356, 71%, 73%)
CMYK	cmyk(0%, 70.6%, 65.8%, 26.7%)
CIE-LAB	lab(43.76, 53.04, 25.72)
CIE-LCH	lch(43.76, 58.95, 25.87°)
OKLab	oklab(53.57% 0.1566 0.0609)
OKLCH	oklch(53.57% 0.168 21.3)
XYZ	xyz(22.7875, 13.6706, 6.2883)
Luminance	0.1367 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3740 #37BBB2

analogous

#BB3782 #BB3740 #BB7037

triadic

#BB3740 #40BB37 #3740BB

tetradic

#BB3740 #82BB37 #37BBB2 #7037BB

square

#BB3740 #82BB37 #37BBB2 #7037BB

split-complementary

#BB3740 #37BB70 #3782BB

monochromatic

#5C1B20 #8C2930 #BB3740 #D05F67 #DE8E94

Accessibility & contrast

On white

5.62

#BB3740 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#BB3740 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3740

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3740	#FFFFFF	#000000	##FFFFFF
##BB3740	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)

#5B563F

Deuteranopia (green-blind)

#7D723C

Tritanopia (blue-blind)

#CD0D3B

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3740;
/* rgb */ color: rgb(187, 55, 64);
/* oklch */ color: oklch(53.6% 0.168 21.3);

Tailwind

colors: {
  custom: {
    50: '#d77774',
    500: '#bb3740',
    950: '#000000',
  },
}

SCSS

$custom: #bb3740;
$custom-light: #d77774;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3740",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 64
  },
  "hsl": {
    "h": 355.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.5357,
    "c": 0.16799,
    "h": 21.3
  },
  "luminance": 0.13667
}

Semantic roles & 50–950 ramp

primary

#BB3740

secondary

#85C9C4

accent

#DED44A

background

#FEF7F7

surface

#FCEEED

border

#D5C9C8

text

#160908

muted

#847B7B

Preview Lab

Preview with #BB3740

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

Preview Lab → · Contrast checker → · Palette generator →