#B13F3F#B13F3F

#B13F3F is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.8% C 0.149 H 23.7°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#B13F3F
RGB	rgb(177, 63, 63)
HSL	hsl(0, 48%, 47%)
HSV	hsv(0, 64%, 69%)
CMYK	cmyk(0%, 64.4%, 64.4%, 30.6%)
CIE-LAB	lab(43.16, 46.36, 25.19)
CIE-LCH	lch(43.16, 52.76, 28.52°)
OKLab	oklab(52.78% 0.1364 0.06)
OKLCH	oklch(52.78% 0.149 23.7)
XYZ	xyz(20.8082, 13.2638, 6.1661)
Luminance	0.1326 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B13F3F #3FB1B1

analogous

#B13F78 #B13F3F #B1783F

triadic

#B13F3F #3FB13F #3F3FB1

tetradic

#B13F3F #78B13F #3FB1B1 #783FB1

square

#B13F3F #78B13F #3FB1B1 #783FB1

split-complementary

#B13F3F #3FB178 #3F78B1

monochromatic

#571F1F #842F2F #B13F3F #C86565 #D89292

Accessibility & contrast

On white

5.75

#B13F3F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#B13F3F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B13F3F

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B13F3F	#FFFFFF	#000000	##FFFFFF
##B13F3F	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D573E

Deuteranopia (green-blind)

#7A6F3C

Tritanopia (blue-blind)

#C22640

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b13f3f;
/* rgb */ color: rgb(177, 63, 63);
/* oklch */ color: oklch(52.8% 0.149 23.7);

Tailwind

colors: {
  custom: {
    50: '#cf7a74',
    500: '#b13f3f',
    950: '#000000',
  },
}

SCSS

$custom: #b13f3f;
$custom-light: #cf7a74;
$custom-dark: #000000;

JSON

{
  "hex": "#b13f3f",
  "rgb": {
    "r": 177,
    "g": 63,
    "b": 63
  },
  "hsl": {
    "h": 0,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.52782,
    "c": 0.14898,
    "h": 23.7
  },
  "luminance": 0.13261
}

Semantic roles & 50–950 ramp

primary

#B13F3F

secondary

#88C4C4

accent

#D7D751

background

#FDF7F7

surface

#FBEEED

border

#D4C9C8

text

#150A08

muted

#837C7B

Preview Lab

Preview with #B13F3F

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

Preview Lab → · Contrast checker → · Palette generator →