#BB3729#BB3729

#BB3729 is a mid, vivid red. Relative luminance 0.135; OKLCH L 53.2% C 0.171 H 29.8°. Best body text is #FFFFFF at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#BB3729
RGB	rgb(187, 55, 41)
HSL	hsl(6, 64%, 45%)
HSV	hsv(6, 78%, 73%)
CMYK	cmyk(0%, 70.6%, 78.1%, 26.7%)
CIE-LAB	lab(43.45, 51.96, 38.77)
CIE-LCH	lch(43.45, 64.83, 36.72°)
OKLab	oklab(53.24% 0.1484 0.085)
OKLCH	oklch(53.24% 0.171 29.8)
XYZ	xyz(22.2625, 13.4607, 3.5233)
Luminance	0.1346 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3729 #29ADBB

analogous

#BB2964 #BB3729 #BB8029

triadic

#BB3729 #29BB37 #3729BB

tetradic

#BB3729 #64BB29 #29ADBB #8029BB

square

#BB3729 #64BB29 #29ADBB #8029BB

split-complementary

#BB3729 #29BB80 #2964BB

monochromatic

#571913 #89281E #BB3729 #D7574A #E2867C

Accessibility & contrast

On white

5.69

#BB3729 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#BB3729 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3729

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3729	#FFFFFF	#000000	##FFFFFF
##BB3729	1.00	5.69	3.69	5.69
#FFFFFF	5.69	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5426

Deuteranopia (green-blind)

#7E7124

Tritanopia (blue-blind)

#CE0035

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3729;
/* rgb */ color: rgb(187, 55, 41);
/* oklch */ color: oklch(53.2% 0.171 29.8);

Tailwind

colors: {
  custom: {
    50: '#d87664',
    500: '#bb3729',
    950: '#000000',
  },
}

SCSS

$custom: #bb3729;
$custom-light: #d87664;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3729",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 41
  },
  "hsl": {
    "h": 5.753,
    "s": 64.035,
    "l": 44.706
  },
  "oklch": {
    "l": 0.53241,
    "c": 0.17097,
    "h": 29.8
  },
  "luminance": 0.13457
}

Semantic roles & 50–950 ramp

primary

#BB3729

secondary

#75C2CB

accent

#D7E741

background

#FEF7F6

surface

#FDEDEB

border

#D5C8C6

text

#160905

muted

#847B7A

Preview Lab

Preview with #BB3729

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

Preview Lab → · Contrast checker → · Palette generator →