#BB3728#BB3728

#BB3728 is a mid, vivid red. Relative luminance 0.135; OKLCH L 53.2% C 0.171 H 30.1°. Best body text is #FFFFFF at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#BB3728
RGB	rgb(187, 55, 40)
HSL	hsl(6, 65%, 45%)
HSV	hsv(6, 79%, 73%)
CMYK	cmyk(0%, 70.6%, 78.6%, 26.7%)
CIE-LAB	lab(43.44, 51.93, 39.30)
CIE-LCH	lch(43.44, 65.12, 37.12°)
OKLab	oklab(53.23% 0.148 0.0859)
OKLCH	oklch(53.23% 0.171 30.1)
XYZ	xyz(22.2453, 13.4538, 3.4326)
Luminance	0.1345 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3728 #28ACBB

analogous

#BB2863 #BB3728 #BB8028

triadic

#BB3728 #28BB37 #3728BB

tetradic

#BB3728 #63BB28 #28ACBB #8028BB

square

#BB3728 #63BB28 #28ACBB #8028BB

split-complementary

#BB3728 #28BB80 #2863BB

monochromatic

#561912 #89281D #BB3728 #D85748 #E3857B

Accessibility & contrast

On white

5.69

#BB3728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#BB3728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3728

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3728	#FFFFFF	#000000	##FFFFFF
##BB3728	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)

#5E5425

Deuteranopia (green-blind)

#7F7122

Tritanopia (blue-blind)

#CE0035

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3728;
/* rgb */ color: rgb(187, 55, 40);
/* oklch */ color: oklch(53.2% 0.171 30.1);

Tailwind

colors: {
  custom: {
    50: '#d87663',
    500: '#bb3728',
    950: '#000000',
  },
}

SCSS

$custom: #bb3728;
$custom-light: #d87663;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3728",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.122,
    "s": 64.758,
    "l": 44.51
  },
  "oklch": {
    "l": 0.5323,
    "c": 0.17113,
    "h": 30.1
  },
  "luminance": 0.1345
}

Semantic roles & 50–950 ramp

primary

#BB3728

secondary

#74C2CB

accent

#D7E840

background

#FEF7F6

surface

#FDEDEB

border

#D5C8C6

text

#160905

muted

#847B7A

Preview Lab

Preview with #BB3728

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

Preview Lab → · Contrast checker → · Palette generator →