#B23737#B23737
#B23737 is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.9% C 0.159 H 24.6°. Best body text is #FFFFFF at 6.01:1 contrast (WCAG AA passes).
Color values
| HEX | #B23737 |
|---|---|
| RGB | rgb(178, 55, 55) |
| HSL | hsl(0, 53%, 46%) |
| HSV | hsv(0, 69%, 70%) |
| CMYK | cmyk(0%, 69.1%, 69.1%, 30.2%) |
| CIE-LAB | lab(41.96, 49.61, 28.57) |
| CIE-LCH | lch(41.96, 57.25, 29.94°) |
| OKLab | oklab(51.88% 0.1449 0.0664) |
| OKLCH | oklch(51.88% 0.159 24.6) |
| XYZ | xyz(20.4181, 12.4762, 4.9467) |
| Luminance | 0.1247 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Dull Red
#BB3F3F
ΔE00 2.77
Brown
#A52A2A
ΔE00 4.02
Firebrick
#B22222
ΔE00 4.45
Cardinal
#C41E3A
ΔE00 4.63
Reddish
#C44240
ΔE00 4.77
Lipstick Red
#C0022F
ΔE00 4.83
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B23737 #37B2B2
analogous
#B23774 #B23737 #B27437
triadic
#B23737 #37B237 #3737B2
tetradic
#B23737 #74B237 #37B2B2 #7437B2
square
#B23737 #74B237 #37B2B2 #7437B2
split-complementary
#B23737 #37B274 #3774B2
monochromatic
#541A1A #832929 #B23737 #CC5A5A #DB8989
Accessibility & contrast
On white
6.01
#B23737 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.49
#B23737 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B23737
6.01:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B23737 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B23737 | 1.00 | 6.01 | 3.49 | 6.01 |
| #FFFFFF | 6.01 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.49 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 6.01 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#595236
Deuteranopia (green-blind)
#786D33
Tritanopia (blue-blind)
#C41338
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #b23737; /* rgb */ color: rgb(178, 55, 55); /* oklch */ color: oklch(51.9% 0.159 24.6);
Tailwind
colors: {
custom: {
50: '#d0756e',
500: '#b23737',
950: '#000000',
},
}SCSS
$custom: #b23737; $custom-light: #d0756e; $custom-dark: #000000;
JSON
{
"hex": "#b23737",
"rgb": {
"r": 178,
"g": 55,
"b": 55
},
"hsl": {
"h": 0,
"s": 52.79,
"l": 45.686
},
"oklch": {
"l": 0.5188,
"c": 0.15942,
"h": 24.6
},
"luminance": 0.12473
}Semantic roles & 50–950 ramp
primary
#B23737
secondary
#80C5C5
accent
#DCDC4C
background
#FDF7F6
surface
#FBEDEB
border
#D4C8C6
text
#150907
muted
#837B7A