#B73729#B73729
#B73729 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.5% C 0.167 H 29.9°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).
Color values
| HEX | #B73729 |
|---|---|
| RGB | rgb(183, 55, 41) |
| HSL | hsl(6, 63%, 44%) |
| HSV | hsv(6, 78%, 72%) |
| CMYK | cmyk(0%, 69.9%, 77.6%, 28.2%) |
| CIE-LAB | lab(42.71, 50.64, 37.76) |
| CIE-LCH | lch(42.71, 63.17, 36.71°) |
| OKLab | oklab(52.55% 0.1447 0.0831) |
| OKLCH | oklch(52.55% 0.167 29.9) |
| XYZ | xyz(21.2973, 12.9630, 3.4781) |
| Luminance | 0.1296 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Firebrick
#B22222
ΔE00 3.83
Brick
#A03623
ΔE00 4.76
Scarlet
#BE0119
ΔE00 4.77
Brownish Red
#9E3623
ΔE00 5.14
Dull Red
#BB3F3F
ΔE00 5.36
Rusty Red
#AF2F0D
ΔE00 5.53
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B73729 #29A9B7
analogous
#B72962 #B73729 #B77E29
triadic
#B73729 #29B737 #3729B7
tetradic
#B73729 #62B729 #29A9B7 #7E29B7
square
#B73729 #62B729 #29A9B7 #7E29B7
split-complementary
#B73729 #29B77E #2962B7
monochromatic
#531913 #85281E #B73729 #D65547 #E18479
Accessibility & contrast
On white
5.85
#B73729 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.59
#B73729 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B73729
5.85:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B73729 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B73729 | 1.00 | 5.85 | 3.59 | 5.85 |
| #FFFFFF | 5.85 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.59 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.85 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5C5326
Deuteranopia (green-blind)
#7C6F24
Tritanopia (blue-blind)
#CA0635
Achromatopsia (no color)
#656565
Design tokens & code
CSS
--color: #b73729; /* rgb */ color: rgb(183, 55, 41); /* oklch */ color: oklch(52.5% 0.167 29.9);
Tailwind
colors: {
custom: {
50: '#d57664',
500: '#b73729',
950: '#000000',
},
}SCSS
$custom: #b73729; $custom-light: #d57664; $custom-dark: #000000;
JSON
{
"hex": "#b73729",
"rgb": {
"r": 183,
"g": 55,
"b": 41
},
"hsl": {
"h": 5.915,
"s": 63.393,
"l": 43.922
},
"oklch": {
"l": 0.5255,
"c": 0.16683,
"h": 29.9
},
"luminance": 0.1296
}Semantic roles & 50–950 ramp
primary
#B73729
secondary
#73C0C9
accent
#D6E641
background
#FEF7F6
surface
#FCEDEB
border
#D5C8C6
text
#160905
muted
#847B7A