#B13F37#B13F37

#B13F37 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.6% C 0.150 H 27.4°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#B13F37
RGB	rgb(177, 63, 55)
HSL	hsl(4, 53%, 45%)
HSV	hsv(4, 69%, 69%)
CMYK	cmyk(0%, 64.4%, 68.9%, 30.6%)
CIE-LAB	lab(43.03, 45.88, 29.82)
CIE-LCH	lch(43.03, 54.72, 33.02°)
OKLab	oklab(52.65% 0.1333 0.0692)
OKLCH	oklch(52.65% 0.15 27.4)
XYZ	xyz(20.6007, 13.1808, 5.0731)
Luminance	0.1318 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13F37 #37A9B1

analogous

#B1376C #B13F37 #B17C37

triadic

#B13F37 #37B13F #3F37B1

tetradic

#B13F37 #6CB137 #37A9B1 #7C37B1

square

#B13F37 #6CB137 #37A9B1 #7C37B1

split-complementary

#B13F37 #37B17C #376CB1

monochromatic

#541E1A #822E28 #B13F37 #CC615A #DA8E88

Accessibility & contrast

On white

5.78

#B13F37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#B13F37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13F37

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13F37	#FFFFFF	#000000	##FFFFFF
##B13F37	1.00	5.78	3.64	5.78
#FFFFFF	5.78	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5635

Deuteranopia (green-blind)

#7A6F34

Tritanopia (blue-blind)

#C2243E

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b13f37;
/* rgb */ color: rgb(177, 63, 55);
/* oklch */ color: oklch(52.6% 0.150 27.4);

Tailwind

colors: {
  custom: {
    50: '#cf7a6e',
    500: '#b13f37',
    950: '#000000',
  },
}

SCSS

$custom: #b13f37;
$custom-light: #cf7a6e;
$custom-dark: #000000;

JSON

{
  "hex": "#b13f37",
  "rgb": {
    "r": 177,
    "g": 63,
    "b": 55
  },
  "hsl": {
    "h": 3.934,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.5265,
    "c": 0.15019,
    "h": 27.4
  },
  "luminance": 0.13178
}

Semantic roles & 50–950 ramp

primary

#B13F37

secondary

#80C0C4

accent

#D3DC4C

background

#FDF7F6

surface

#FBEEEC

border

#D4C9C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B13F37

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

Preview Lab → · Contrast checker → · Palette generator →