#B13B1B#B13B1B
#B13B1B is a mid, vivid red. Relative luminance 0.126; OKLCH L 51.8% C 0.159 H 35.5°. Best body text is #FFFFFF at 5.98:1 contrast (WCAG AA passes).
Color values
| HEX | #B13B1B |
|---|---|
| RGB | rgb(177, 59, 27) |
| HSL | hsl(13, 74%, 40%) |
| HSV | hsv(13, 85%, 69%) |
| CMYK | cmyk(0%, 66.7%, 84.7%, 30.6%) |
| CIE-LAB | lab(42.09, 46.50, 43.98) |
| CIE-LCH | lch(42.09, 64.00, 43.40°) |
| OKLab | oklab(51.84% 0.1298 0.0926) |
| OKLCH | oklch(51.84% 0.159 35.5) |
| XYZ | xyz(19.8956, 12.5571, 2.4129) |
| Luminance | 0.1255 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Rusty Red
#AF2F0D
ΔE00 2.40
Rust
#B7410E
ΔE00 3.94
Rust (survey)
#A83C09
ΔE00 4.11
Rust Red
#AA2704
ΔE00 4.12
Brick
#A03623
ΔE00 4.86
Russet
#A13905
ΔE00 5.16
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B13B1B #1B91B1
analogous
#B11B46 #B13B1B #B1861B
triadic
#B13B1B #1BB13B #3B1BB1
tetradic
#B13B1B #46B11B #1B91B1 #861BB1
square
#B13B1B #46B11B #1B91B1 #861BB1
split-complementary
#B13B1B #1BB186 #1B46B1
monochromatic
#47180B #7C2913 #B13B1B #DF512B #E77D60
Accessibility & contrast
On white
5.98
#B13B1B on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.51
#B13B1B on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B13B1B
5.98:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B13B1B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B13B1B | 1.00 | 5.98 | 3.51 | 5.98 |
| #FFFFFF | 5.98 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.51 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.98 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5E5315
Deuteranopia (green-blind)
#7B6D15
Tritanopia (blue-blind)
#C31635
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #b13b1b; /* rgb */ color: rgb(177, 59, 27); /* oklch */ color: oklch(51.8% 0.159 35.5);
Tailwind
colors: {
custom: {
50: '#d1775b',
500: '#b13b1b',
950: '#000000',
},
}SCSS
$custom: #b13b1b; $custom-light: #d1775b; $custom-dark: #000000;
JSON
{
"hex": "#b13b1b",
"rgb": {
"r": 177,
"g": 59,
"b": 27
},
"hsl": {
"h": 12.8,
"s": 73.529,
"l": 40
},
"oklch": {
"l": 0.51843,
"c": 0.15949,
"h": 35.5
},
"luminance": 0.12554
}Semantic roles & 50–950 ramp
primary
#B13B1B
secondary
#5DB4CB
accent
#C9F038
background
#FEF7F5
surface
#FCEDE9
border
#D5C8C5
text
#160904
muted
#847B79