#BB3721#BB3721

#BB3721 is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.2% C 0.172 H 32.1°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#BB3721
RGB	rgb(187, 55, 33)
HSL	hsl(9, 70%, 43%)
HSV	hsv(9, 82%, 73%)
CMYK	cmyk(0%, 70.6%, 82.4%, 26.7%)
CIE-LAB	lab(43.38, 51.70, 42.91)
CIE-LCH	lch(43.38, 67.19, 39.69°)
OKLab	oklab(53.16% 0.146 0.0914)
OKLCH	oklch(53.16% 0.172 32.1)
XYZ	xyz(22.1368, 13.4104, 2.8614)
Luminance	0.1341 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3721 #21A5BB

analogous

#BB2158 #BB3721 #BB8421

triadic

#BB3721 #21BB37 #3721BB

tetradic

#BB3721 #58BB21 #21A5BB #8421BB

square

#BB3721 #58BB21 #21A5BB #8421BB

split-complementary

#BB3721 #21BB84 #2158BB

monochromatic

#53180F #872818 #BB3721 #DD533D #E68171

Accessibility & contrast

On white

5.70

#BB3721 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#BB3721 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3721

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3721	#FFFFFF	#000000	##FFFFFF
##BB3721	1.00	5.70	3.68	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E541D

Deuteranopia (green-blind)

#7F711A

Tritanopia (blue-blind)

#CE0033

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #bb3721;
/* rgb */ color: rgb(187, 55, 33);
/* oklch */ color: oklch(53.2% 0.172 32.1);

Tailwind

colors: {
  custom: {
    50: '#d9765f',
    500: '#bb3721',
    950: '#000000',
  },
}

SCSS

$custom: #bb3721;
$custom-light: #d9765f;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3721",
  "rgb": {
    "r": 187,
    "g": 55,
    "b": 33
  },
  "hsl": {
    "h": 8.571,
    "s": 70,
    "l": 43.137
  },
  "oklch": {
    "l": 0.53162,
    "c": 0.17228,
    "h": 32.1
  },
  "luminance": 0.13407
}

Semantic roles & 50–950 ramp

primary

#BB3721

secondary

#6BBFCC

accent

#D3ED3B

background

#FEF7F5

surface

#FDEDE9

border

#D5C8C5

text

#170904

muted

#857B79

Preview Lab

Preview with #BB3721

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

Preview Lab → · Contrast checker → · Palette generator →