#B33F37#B33F37
#B33F37 is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.0% C 0.152 H 27.4°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).
Color values
| HEX | #B33F37 |
|---|---|
| RGB | rgb(179, 63, 55) |
| HSL | hsl(4, 53%, 46%) |
| HSV | hsv(4, 69%, 70%) |
| CMYK | cmyk(0%, 64.8%, 69.3%, 29.8%) |
| CIE-LAB | lab(43.39, 46.58, 30.32) |
| CIE-LCH | lch(43.39, 55.58, 33.06°) |
| OKLab | oklab(52.98% 0.1353 0.0702) |
| OKLCH | oklch(52.98% 0.152 27.4) |
| XYZ | xyz(21.0597, 13.4175, 5.0946) |
| Luminance | 0.1341 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Dull Red
#BB3F3F
ΔE00 2.73
Reddish
#C44240
ΔE00 3.98
Firebrick
#B22222
ΔE00 4.98
Brown
#A52A2A
ΔE00 5.32
Brick
#A03623
ΔE00 5.90
Dusty Red
#B9484E
ΔE00 5.98
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#B33F37 #37ABB3
analogous
#B3376D #B33F37 #B37D37
triadic
#B33F37 #37B33F #3F37B3
tetradic
#B33F37 #6DB337 #37ABB3 #7D37B3
square
#B33F37 #6DB337 #37ABB3 #7D37B3
split-complementary
#B33F37 #37B37D #376DB3
monochromatic
#551E1A #842F29 #B33F37 #CD625B #DB8F8A
Accessibility & contrast
On white
5.70
#B33F37 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.68
#B33F37 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #B33F37
5.70:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##B33F37 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##B33F37 | 1.00 | 5.70 | 3.68 | 5.70 |
| #FFFFFF | 5.70 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.68 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.70 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5E5735
Deuteranopia (green-blind)
#7B7034
Tritanopia (blue-blind)
#C5233E
Achromatopsia (no color)
#666666
Design tokens & code
CSS
--color: #b33f37; /* rgb */ color: rgb(179, 63, 55); /* oklch */ color: oklch(53.0% 0.152 27.4);
Tailwind
colors: {
custom: {
50: '#d17a6e',
500: '#b33f37',
950: '#000000',
},
}SCSS
$custom: #b33f37; $custom-light: #d17a6e; $custom-dark: #000000;
JSON
{
"hex": "#b33f37",
"rgb": {
"r": 179,
"g": 63,
"b": 55
},
"hsl": {
"h": 3.871,
"s": 52.991,
"l": 45.882
},
"oklch": {
"l": 0.5298,
"c": 0.1524,
"h": 27.4
},
"luminance": 0.13415
}Semantic roles & 50–950 ramp
primary
#B33F37
secondary
#81C1C5
accent
#D3DC4B
background
#FDF7F6
surface
#FBEEEC
border
#D4C9C7
text
#150A07
muted
#837C7A