#BB3638#BB3638

#BB3638 is a mid, vivid red. Relative luminance 0.135; OKLCH L 53.3% C 0.170 H 24.3°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#BB3638
RGB	rgb(187, 54, 56)
HSL	hsl(359, 55%, 47%)
HSV	hsv(359, 71%, 73%)
CMYK	cmyk(0%, 71.1%, 70.1%, 26.7%)
CIE-LAB	lab(43.50, 52.99, 30.21)
CIE-LCH	lch(43.50, 61.00, 29.69°)
OKLab	oklab(53.34% 0.1547 0.0698)
OKLCH	oklch(53.34% 0.17 24.3)
XYZ	xyz(22.5290, 13.4920, 5.1586)
Luminance	0.1349 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB3638 #36BBB9

analogous

#BB367A #BB3638 #BB7736

triadic

#BB3638 #38BB36 #3638BB

tetradic

#BB3638 #7ABB36 #36BBB9 #7736BB

square

#BB3638 #7ABB36 #36BBB9 #7736BB

split-complementary

#BB3638 #36BB77 #367ABB

monochromatic

#5C1B1C #8C282A #BB3638 #D05E5F #DE8D8E

Accessibility & contrast

On white

5.68

#BB3638 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#BB3638 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB3638

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB3638	#FFFFFF	#000000	##FFFFFF
##BB3638	1.00	5.68	3.70	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5537

Deuteranopia (green-blind)

#7D7134

Tritanopia (blue-blind)

#CE0438

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #bb3638;
/* rgb */ color: rgb(187, 54, 56);
/* oklch */ color: oklch(53.3% 0.170 24.3);

Tailwind

colors: {
  custom: {
    50: '#d7766e',
    500: '#bb3638',
    950: '#000000',
  },
}

SCSS

$custom: #bb3638;
$custom-light: #d7766e;
$custom-dark: #000000;

JSON

{
  "hex": "#bb3638",
  "rgb": {
    "r": 187,
    "g": 54,
    "b": 56
  },
  "hsl": {
    "h": 359.098,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.53335,
    "c": 0.16971,
    "h": 24.3
  },
  "luminance": 0.13489
}

Semantic roles & 50–950 ramp

primary

#BB3638

secondary

#84C9C8

accent

#DFDC49

background

#FEF7F6

surface

#FCEEEC

border

#D5C9C7

text

#160907

muted

#847B7A

Preview Lab

Preview with #BB3638

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

Preview Lab → · Contrast checker → · Palette generator →