#BB3521#BB3521

#BB3521 is a mid, vivid red. Relative luminance 0.132; OKLCH L 53.0% C 0.174 H 31.5°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#BB3521
RGB	rgb(187, 53, 33)
HSL	hsl(8, 70%, 43%)
HSV	hsv(8, 82%, 73%)
CMYK	cmyk(0%, 71.7%, 82.4%, 26.7%)
CIE-LAB	lab(43.10, 52.46, 42.65)
CIE-LCH	lch(43.10, 67.61, 39.11°)
OKLab	oklab(52.96% 0.1484 0.0909)
OKLCH	oklch(52.96% 0.174 31.5)
XYZ	xyz(22.0438, 13.2242, 2.8304)
Luminance	0.1322 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3521 #21A7BB

analogous

#BB215A #BB3521 #BB8221

triadic

#BB3521 #21BB35 #3521BB

tetradic

#BB3521 #5ABB21 #21A7BB #8221BB

square

#BB3521 #5ABB21 #21A7BB #8221BB

split-complementary

#BB3521 #21BB82 #215ABB

monochromatic

#53180F #872618 #BB3521 #DD513D #E68071

Accessibility & contrast

On white

5.76

#BB3521 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#BB3521 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3521

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3521	#FFFFFF	#000000	##FFFFFF
##BB3521	1.00	5.76	3.64	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D531D

Deuteranopia (green-blind)

#7E711A

Tritanopia (blue-blind)

#CE0032

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #bb3521;
/* rgb */ color: rgb(187, 53, 33);
/* oklch */ color: oklch(53.0% 0.174 31.5);

Tailwind

colors: {
  custom: {
    50: '#d9755e',
    500: '#bb3521',
    950: '#000000',
  },
}

SCSS

$custom: #bb3521;
$custom-light: #d9755e;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3521",
  "rgb": {
    "r": 187,
    "g": 53,
    "b": 33
  },
  "hsl": {
    "h": 7.792,
    "s": 70,
    "l": 43.137
  },
  "oklch": {
    "l": 0.52956,
    "c": 0.17398,
    "h": 31.5
  },
  "luminance": 0.13221
}

Semantic roles & 50–950 ramp

primary

#BB3521

secondary

#6BC0CC

accent

#D6ED3B

background

#FEF7F5

surface

#FDEDE9

border

#D5C8C5

text

#170904

muted

#857B79

Preview Lab

Preview with #BB3521

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

Preview Lab → · Contrast checker → · Palette generator →