#B4371F#B4371F
#B4371F is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.165 H 32.9°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).
Color values
| HEX | #B4371F |
|---|---|
| RGB | rgb(180, 55, 31) |
| HSL | hsl(10, 71%, 41%) |
| HSV | hsv(10, 83%, 71%) |
| CMYK | cmyk(0%, 69.4%, 82.8%, 29.4%) |
| CIE-LAB | lab(42.06, 49.30, 42.21) |
| CIE-LCH | lch(42.06, 64.90, 40.57°) |
| OKLab | oklab(51.93% 0.1389 0.0899) |
| OKLCH | oklch(51.93% 0.165 32.9) |
| XYZ | xyz(20.4383, 12.5377, 2.6399) |
| Luminance | 0.1253 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Rusty Red
#AF2F0D
ΔE00 3.06
Brick
#A03623
ΔE00 4.29
Rust Red
#AA2704
ΔE00 4.57
Brownish Red
#9E3623
ΔE00 4.67
Firebrick
#B22222
ΔE00 5.17
Rust
#B7410E
ΔE00 5.64
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B4371F #1F9CB4
analogous
#B41F52 #B4371F #B4821F
triadic
#B4371F #1FB437 #371FB4
tetradic
#B4371F #52B41F #1F9CB4 #821FB4
square
#B4371F #52B41F #1F9CB4 #821FB4
split-complementary
#B4371F #1FB482 #1F52B4
monochromatic
#4C170D #802716 #B4371F #DC4F34 #E57C68
Accessibility & contrast
On white
5.99
#B4371F on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.51
#B4371F on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B4371F
5.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B4371F | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B4371F | 1.00 | 5.99 | 3.51 | 5.99 |
| #FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.51 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5C521B
Deuteranopia (green-blind)
#7B6D19
Tritanopia (blue-blind)
#C60633
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #b4371f; /* rgb */ color: rgb(180, 55, 31); /* oklch */ color: oklch(51.9% 0.165 32.9);
Tailwind
colors: {
custom: {
50: '#d3755d',
500: '#b4371f',
950: '#000000',
},
}SCSS
$custom: #b4371f; $custom-light: #d3755d; $custom-dark: #000000;
JSON
{
"hex": "#b4371f",
"rgb": {
"r": 180,
"g": 55,
"b": 31
},
"hsl": {
"h": 9.664,
"s": 70.616,
"l": 41.373
},
"oklch": {
"l": 0.51932,
"c": 0.16544,
"h": 32.9
},
"luminance": 0.12535
}Semantic roles & 50–950 ramp
primary
#B4371F
secondary
#64BACB
accent
#D1ED3A
background
#FEF7F5
surface
#FCEDE9
border
#D5C8C5
text
#160904
muted
#847B79