#B4371B#B4371B
#B4371B is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.166 H 33.9°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).
Color values
| HEX | #B4371B |
|---|---|
| RGB | rgb(180, 55, 27) |
| HSL | hsl(11, 74%, 41%) |
| HSV | hsv(11, 85%, 71%) |
| CMYK | cmyk(0%, 69.4%, 85%, 29.4%) |
| CIE-LAB | lab(42.03, 49.19, 44.13) |
| CIE-LCH | lch(42.03, 66.09, 41.90°) |
| OKLab | oklab(51.9% 0.1379 0.0926) |
| OKLCH | oklch(51.9% 0.166 33.9) |
| XYZ | xyz(20.3888, 12.5179, 2.3793) |
| Luminance | 0.1252 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Rusty Red
#AF2F0D
ΔE00 2.39
Rust Red
#AA2704
ΔE00 4.08
Brick
#A03623
ΔE00 4.68
Rust
#B7410E
ΔE00 4.80
Brownish Red
#9E3623
ΔE00 5.04
Rust (survey)
#A83C09
ΔE00 5.11
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B4371B #1B98B4
analogous
#B41B4C #B4371B #B4831B
triadic
#B4371B #1BB437 #371BB4
tetradic
#B4371B #4CB41B #1B98B4 #831BB4
square
#B4371B #4CB41B #1B98B4 #831BB4
split-complementary
#B4371B #1BB483 #1B4CB4
monochromatic
#4A160B #7F2713 #B4371B #DF4D2D #E77A62
Accessibility & contrast
On white
5.99
#B4371B on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.50
#B4371B on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B4371B
5.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B4371B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B4371B | 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)
#5C5216
Deuteranopia (green-blind)
#7B6D14
Tritanopia (blue-blind)
#C70532
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #b4371b; /* rgb */ color: rgb(180, 55, 27); /* oklch */ color: oklch(51.9% 0.166 33.9);
Tailwind
colors: {
custom: {
50: '#d4755b',
500: '#b4371b',
950: '#000000',
},
}SCSS
$custom: #b4371b; $custom-light: #d4755b; $custom-dark: #000000;
JSON
{
"hex": "#b4371b",
"rgb": {
"r": 180,
"g": 55,
"b": 27
},
"hsl": {
"h": 10.98,
"s": 73.913,
"l": 40.588
},
"oklch": {
"l": 0.519,
"c": 0.16611,
"h": 33.9
},
"luminance": 0.12515
}Semantic roles & 50–950 ramp
primary
#B4371B
secondary
#5FB8CC
accent
#CFF137
background
#FEF7F5
surface
#FCEDE9
border
#D5C8C5
text
#160904
muted
#847B79