#B3371D#B3371D

#B3371D is a mid, vivid red. Relative luminance 0.124; OKLCH L 51.7% C 0.165 H 33.5°. Best body text is #FFFFFF at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#B3371D
RGB	rgb(179, 55, 29)
HSL	hsl(10, 72%, 41%)
HSV	hsv(10, 84%, 70%)
CMYK	cmyk(0%, 69.3%, 83.8%, 29.8%)
CIE-LAB	lab(41.86, 48.90, 42.95)
CIE-LCH	lch(41.86, 65.09, 41.29°)
OKLab	oklab(51.74% 0.1374 0.0909)
OKLCH	oklch(51.74% 0.165 33.5)
XYZ	xyz(20.1807, 12.4079, 2.4945)
Luminance	0.1240 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3371D #1D99B3

analogous

#B31D4E #B3371D #B3821D

triadic

#B3371D #1DB337 #371DB3

tetradic

#B3371D #4EB31D #1D99B3 #821DB3

square

#B3371D #4EB31D #1D99B3 #821DB3

split-complementary

#B3371D #1DB382 #1D4EB3

monochromatic

#4A170C #7E2714 #B3371D #DD4E30 #E67B64

Accessibility & contrast

On white

6.03

#B3371D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#B3371D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B3371D

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3371D	#FFFFFF	#000000	##FFFFFF
##B3371D	1.00	6.03	3.48	6.03
#FFFFFF	6.03	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5118

Deuteranopia (green-blind)

#7A6D16

Tritanopia (blue-blind)

#C50732

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b3371d;
/* rgb */ color: rgb(179, 55, 29);
/* oklch */ color: oklch(51.7% 0.165 33.5);

Tailwind

colors: {
  custom: {
    50: '#d3755c',
    500: '#b3371d',
    950: '#000000',
  },
}

SCSS

$custom: #b3371d;
$custom-light: #d3755c;
$custom-dark: #000000;

JSON

{
  "hex": "#b3371d",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 29
  },
  "hsl": {
    "h": 10.4,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.51742,
    "c": 0.16475,
    "h": 33.5
  },
  "luminance": 0.12405
}

Semantic roles & 50–950 ramp

primary

#B3371D

secondary

#61B9CB

accent

#CFEF39

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B3371D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →