#BB373B#BB373B

#BB373B is a mid, vivid red. Relative luminance 0.136; OKLCH L 53.5% C 0.168 H 23.4°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#BB373B
RGB	rgb(187, 55, 59)
HSL	hsl(358, 55%, 47%)
HSV	hsv(358, 71%, 73%)
CMYK	cmyk(0%, 70.6%, 68.4%, 26.7%)
CIE-LAB	lab(43.68, 52.77, 28.64)
CIE-LCH	lch(43.68, 60.04, 28.49°)
OKLab	oklab(53.49% 0.1546 0.0668)
OKLCH	oklch(53.49% 0.168 23.4)
XYZ	xyz(22.6516, 13.6163, 5.5723)
Luminance	0.1361 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB373B #37BBB7

analogous

#BB377D #BB373B #BB7537

triadic

#BB373B #3BBB37 #373BBB

tetradic

#BB373B #7DBB37 #37BBB7 #7537BB

square

#BB373B #7DBB37 #37BBB7 #7537BB

split-complementary

#BB373B #37BB75 #377DBB

monochromatic

#5C1B1D #8C292C #BB373B #D05F63 #DE8E91

Accessibility & contrast

On white

5.64

#BB373B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#BB373B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB373B

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB373B	#FFFFFF	#000000	##FFFFFF
##BB373B	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C553A

Deuteranopia (green-blind)

#7D7237

Tritanopia (blue-blind)

#CD0A3A

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb373b;
/* rgb */ color: rgb(187, 55, 59);
/* oklch */ color: oklch(53.5% 0.168 23.4);

Tailwind

colors: {
  custom: {
    50: '#d77771',
    500: '#bb373b',
    950: '#000000',
  },
}

SCSS

$custom: #bb373b;
$custom-light: #d77771;
$custom-dark: #000000;

JSON

{
  "hex": "#bb373b",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 59
  },
  "hsl": {
    "h": 358.182,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53485,
    "c": 0.16843,
    "h": 23.4
  },
  "luminance": 0.13613
}

Semantic roles & 50–950 ramp

primary

#BB373B

secondary

#85C9C6

accent

#DED94A

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #BB373B

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

Preview Lab → · Contrast checker → · Palette generator →