#B1312B#B1312B

#B1312B is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.9% C 0.166 H 27.4°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#B1312B
RGB	rgb(177, 49, 43)
HSL	hsl(3, 61%, 43%)
HSV	hsv(3, 76%, 69%)
CMYK	cmyk(0%, 72.3%, 75.7%, 30.6%)
CIE-LAB	lab(40.77, 51.04, 34.22)
CIE-LCH	lch(40.77, 61.45, 33.83°)
OKLab	oklab(50.9% 0.147 0.0764)
OKLCH	oklch(50.9% 0.166 27.4)
XYZ	xyz(19.6681, 11.7212, 3.5118)
Luminance	0.1172 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1312B #2BABB1

analogous

#B12B68 #B1312B #B1742B

triadic

#B1312B #2BB131 #312BB1

tetradic

#B1312B #68B12B #2BABB1 #742BB1

square

#B1312B #68B12B #2BABB1 #742BB1

split-complementary

#B1312B #2BB174 #2B68B1

monochromatic

#4F1613 #80231F #B1312B #D24D47 #DE7D78

Accessibility & contrast

On white

6.28

#B1312B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#B1312B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B1312B

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1312B	#FFFFFF	#000000	##FFFFFF
##B1312B	1.00	6.28	3.34	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#574E29

Deuteranopia (green-blind)

#766A26

Tritanopia (blue-blind)

#C30031

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b1312b;
/* rgb */ color: rgb(177, 49, 43);
/* oklch */ color: oklch(50.9% 0.166 27.4);

Tailwind

colors: {
  custom: {
    50: '#d17265',
    500: '#b1312b',
    950: '#000000',
  },
}

SCSS

$custom: #b1312b;
$custom-light: #d17265;
$custom-dark: #000000;

JSON

{
  "hex": "#b1312b",
  "rgb": {
    "r": 177,
    "g": 49,
    "b": 43
  },
  "hsl": {
    "h": 2.687,
    "s": 60.909,
    "l": 43.137
  },
  "oklch": {
    "l": 0.50903,
    "c": 0.16567,
    "h": 27.4
  },
  "luminance": 0.11718
}

Semantic roles & 50–950 ramp

primary

#B1312B

secondary

#72C2C6

accent

#DDE444

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160805

muted

#847B7A

Preview Lab

Preview with #B1312B

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

Preview Lab → · Contrast checker → · Palette generator →