#B43720#B43720
#B43720 is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.165 H 32.6°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).
Color values
| HEX | #B43720 |
|---|---|
| RGB | rgb(180, 55, 32) |
| HSL | hsl(9, 70%, 42%) |
| HSV | hsv(9, 82%, 71%) |
| CMYK | cmyk(0%, 69.4%, 82.2%, 29.4%) |
| CIE-LAB | lab(42.07, 49.33, 41.72) |
| CIE-LCH | lch(42.07, 64.61, 40.22°) |
| OKLab | oklab(51.94% 0.1392 0.0891) |
| OKLCH | oklch(51.94% 0.165 32.6) |
| XYZ | xyz(20.4517, 12.5431, 2.7104) |
| Luminance | 0.1254 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Rusty Red
#AF2F0D
ΔE00 3.25
Brick
#A03623
ΔE00 4.21
Brownish Red
#9E3623
ΔE00 4.60
Rust Red
#AA2704
ΔE00 4.72
Firebrick
#B22222
ΔE00 4.98
Scarlet
#BE0119
ΔE00 5.64
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B43720 #209DB4
analogous
#B42053 #B43720 #B48120
triadic
#B43720 #20B437 #3720B4
tetradic
#B43720 #53B420 #209DB4 #8120B4
square
#B43720 #53B420 #209DB4 #8120B4
split-complementary
#B43720 #20B481 #2053B4
monochromatic
#4C170E #802717 #B43720 #DB5036 #E47D6A
Accessibility & contrast
On white
5.99
#B43720 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.51
#B43720 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B43720
5.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B43720 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B43720 | 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)
#5C521C
Deuteranopia (green-blind)
#7B6D1A
Tritanopia (blue-blind)
#C60633
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #b43720; /* rgb */ color: rgb(180, 55, 32); /* oklch */ color: oklch(51.9% 0.165 32.6);
Tailwind
colors: {
custom: {
50: '#d3755e',
500: '#b43720',
950: '#000000',
},
}SCSS
$custom: #b43720; $custom-light: #d3755e; $custom-dark: #000000;
JSON
{
"hex": "#b43720",
"rgb": {
"r": 180,
"g": 55,
"b": 32
},
"hsl": {
"h": 9.324,
"s": 69.811,
"l": 41.569
},
"oklch": {
"l": 0.51941,
"c": 0.16526,
"h": 32.6
},
"luminance": 0.1254
}Semantic roles & 50–950 ramp
primary
#B43720
secondary
#66BBCA
accent
#D1ED3B
background
#FEF7F5
surface
#FCEDE9
border
#D5C8C5
text
#160904
muted
#847B79