#BB3637#BB3637
#BB3637 is a mid, vivid red. Relative luminance 0.135; OKLCH L 53.3% C 0.170 H 24.7°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).
Color values
| HEX | #BB3637 |
|---|---|
| RGB | rgb(187, 54, 55) |
| HSL | hsl(360, 55%, 47%) |
| HSV | hsv(360, 71%, 73%) |
| CMYK | cmyk(0%, 71.1%, 70.6%, 26.7%) |
| CIE-LAB | lab(43.48, 52.94, 30.79) |
| CIE-LCH | lch(43.48, 61.24, 30.18°) |
| OKLab | oklab(53.32% 0.1543 0.0709) |
| OKLCH | oklch(53.32% 0.17 24.7) |
| XYZ | xyz(22.5047, 13.4823, 5.0310) |
| Luminance | 0.1348 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Dull Red
#BB3F3F
ΔE00 1.88
Reddish
#C44240
ΔE00 3.35
Cardinal
#C41E3A
ΔE00 4.18
Cherry (survey)
#CF0234
ΔE00 4.70
Lipstick Red
#C0022F
ΔE00 4.78
Firebrick
#B22222
ΔE00 4.86
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#BB3637 #36BBBA
analogous
#BB3679 #BB3637 #BB7836
triadic
#BB3637 #37BB36 #3637BB
tetradic
#BB3637 #79BB36 #36BBBA #7836BB
square
#BB3637 #79BB36 #36BBBA #7836BB
split-complementary
#BB3637 #36BB78 #3679BB
monochromatic
#5C1B1B #8C2829 #BB3637 #D05E5F #DE8D8E
Accessibility & contrast
On white
5.68
#BB3637 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.70
#BB3637 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #BB3637
5.68:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##BB3637 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##BB3637 | 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)
#5C5436
Deuteranopia (green-blind)
#7D7133
Tritanopia (blue-blind)
#CE0338
Achromatopsia (no color)
#676767
Design tokens & code
CSS
--color: #bb3637; /* rgb */ color: rgb(187, 54, 55); /* oklch */ color: oklch(53.3% 0.170 24.7);
Tailwind
colors: {
custom: {
50: '#d7766e',
500: '#bb3637',
950: '#000000',
},
}SCSS
$custom: #bb3637; $custom-light: #d7766e; $custom-dark: #000000;
JSON
{
"hex": "#bb3637",
"rgb": {
"r": 187,
"g": 54,
"b": 55
},
"hsl": {
"h": 359.549,
"s": 55.187,
"l": 47.255
},
"oklch": {
"l": 0.53319,
"c": 0.16983,
"h": 24.7
},
"luminance": 0.13479
}Semantic roles & 50–950 ramp
primary
#BB3637
secondary
#84C9C8
accent
#DFDD49
background
#FEF7F6
surface
#FCEDEB
border
#D5C8C6
text
#160907
muted
#847B7A