#B4371C#B4371C
#B4371C is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.166 H 33.7°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).
Color values
| HEX | #B4371C |
|---|---|
| RGB | rgb(180, 55, 28) |
| HSL | hsl(11, 73%, 41%) |
| HSV | hsv(11, 84%, 71%) |
| CMYK | cmyk(0%, 69.4%, 84.4%, 29.4%) |
| CIE-LAB | lab(42.03, 49.22, 43.66) |
| CIE-LCH | lch(42.03, 65.79, 41.58°) |
| OKLab | oklab(51.91% 0.1381 0.092) |
| OKLCH | oklch(51.91% 0.166 33.7) |
| XYZ | xyz(20.4006, 12.5226, 2.4413) |
| Luminance | 0.1252 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Rusty Red
#AF2F0D
ΔE00 2.54
Rust Red
#AA2704
ΔE00 4.18
Brick
#A03623
ΔE00 4.57
Brownish Red
#9E3623
ΔE00 4.94
Rust
#B7410E
ΔE00 5.00
Rust (survey)
#A83C09
ΔE00 5.31
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B4371C #1C99B4
analogous
#B41C4D #B4371C #B4831C
triadic
#B4371C #1CB437 #371CB4
tetradic
#B4371C #4DB41C #1C99B4 #831CB4
square
#B4371C #4DB41C #1C99B4 #831CB4
split-complementary
#B4371C #1CB483 #1C4DB4
monochromatic
#4A170C #7F2714 #B4371C #DF4E2F #E77B64
Accessibility & contrast
On white
5.99
#B4371C on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.50
#B4371C on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B4371C
5.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B4371C | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B4371C | 1.00 | 5.99 | 3.50 | 5.99 |
| #FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.50 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5C5217
Deuteranopia (green-blind)
#7B6D15
Tritanopia (blue-blind)
#C70532
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #b4371c; /* rgb */ color: rgb(180, 55, 28); /* oklch */ color: oklch(51.9% 0.166 33.7);
Tailwind
colors: {
custom: {
50: '#d4755b',
500: '#b4371c',
950: '#000000',
},
}SCSS
$custom: #b4371c; $custom-light: #d4755b; $custom-dark: #000000;
JSON
{
"hex": "#b4371c",
"rgb": {
"r": 180,
"g": 55,
"b": 28
},
"hsl": {
"h": 10.658,
"s": 73.077,
"l": 40.784
},
"oklch": {
"l": 0.51907,
"c": 0.16594,
"h": 33.7
},
"luminance": 0.1252
}Semantic roles & 50–950 ramp
primary
#B4371C
secondary
#60B9CC
accent
#CFF038
background
#FEF7F5
surface
#FCEDE9
border
#D5C8C5
text
#160904
muted
#847B79