#B53B2B#B53B2B
#B53B2B is a mid, vivid red. Relative luminance 0.131; OKLCH L 52.7% C 0.161 H 30.6°. Best body text is #FFFFFF at 5.79:1 contrast (WCAG AA passes).
Color values
| HEX | #B53B2B |
|---|---|
| RGB | rgb(181, 59, 43) |
| HSL | hsl(7, 62%, 44%) |
| HSV | hsv(7, 76%, 71%) |
| CMYK | cmyk(0%, 67.4%, 76.2%, 29%) |
| CIE-LAB | lab(42.96, 48.43, 36.81) |
| CIE-LCH | lch(42.96, 60.83, 37.24°) |
| OKLab | oklab(52.68% 0.1384 0.0817) |
| OKLCH | oklch(52.68% 0.161 30.6) |
| XYZ | xyz(21.0584, 13.1292, 3.7104) |
| Luminance | 0.1313 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Firebrick
#B22222
ΔE00 4.38
Brick
#A03623
ΔE00 4.61
Brownish Red
#9E3623
ΔE00 4.98
Dull Red
#BB3F3F
ΔE00 5.37
Scarlet
#BE0119
ΔE00 5.48
Rusty Red
#AF2F0D
ΔE00 5.52
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B53B2B #2BA5B5
analogous
#B52B60 #B53B2B #B5802B
triadic
#B53B2B #2BB53B #3B2BB5
tetradic
#B53B2B #60B52B #2BA5B5 #802BB5
square
#B53B2B #60B52B #2BA5B5 #802BB5
split-complementary
#B53B2B #2BB580 #2B60B5
monochromatic
#521B14 #842B1F #B53B2B #D45949 #E0867B
Accessibility & contrast
On white
5.79
#B53B2B on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.63
#B53B2B on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B53B2B
5.79:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B53B2B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B53B2B | 1.00 | 5.79 | 3.63 | 5.79 |
| #FFFFFF | 5.79 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.63 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.79 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5E5428
Deuteranopia (green-blind)
#7C6F26
Tritanopia (blue-blind)
#C71638
Achromatopsia (no color)
#656565
Design tokens & code
CSS
--color: #b53b2b; /* rgb */ color: rgb(181, 59, 43); /* oklch */ color: oklch(52.7% 0.161 30.6);
Tailwind
colors: {
custom: {
50: '#d37865',
500: '#b53b2b',
950: '#000000',
},
}SCSS
$custom: #b53b2b; $custom-light: #d37865; $custom-dark: #000000;
JSON
{
"hex": "#b53b2b",
"rgb": {
"r": 181,
"g": 59,
"b": 43
},
"hsl": {
"h": 6.957,
"s": 61.607,
"l": 43.922
},
"oklch": {
"l": 0.52677,
"c": 0.16069,
"h": 30.6
},
"luminance": 0.13126
}Semantic roles & 50–950 ramp
primary
#B53B2B
secondary
#74BEC8
accent
#D2E543
background
#FEF7F6
surface
#FCEEEB
border
#D5C9C6
text
#160906
muted
#847B7A