#B1312A#B1312A

#B1312A is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.9% C 0.166 H 27.8°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#B1312A
RGB	rgb(177, 49, 42)
HSL	hsl(3, 62%, 43%)
HSV	hsv(3, 76%, 69%)
CMYK	cmyk(0%, 72.3%, 76.3%, 30.6%)
CIE-LAB	lab(40.76, 51.00, 34.78)
CIE-LCH	lch(40.76, 61.73, 34.29°)
OKLab	oklab(50.89% 0.1467 0.0773)
OKLCH	oklch(50.89% 0.166 27.8)
XYZ	xyz(19.6500, 11.7139, 3.4164)
Luminance	0.1171 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1312A #2AAAB1

analogous

#B12A66 #B1312A #B1742A

triadic

#B1312A #2AB131 #312AB1

tetradic

#B1312A #66B12A #2AAAB1 #742AB1

square

#B1312A #66B12A #2AAAB1 #742AB1

split-complementary

#B1312A #2AB174 #2A66B1

monochromatic

#4E1613 #80231E #B1312A #D34D45 #DF7C77

Accessibility & contrast

On white

6.28

#B1312A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#B1312A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B1312A

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1312A	#FFFFFF	#000000	##FFFFFF
##B1312A	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)

#574E28

Deuteranopia (green-blind)

#766A25

Tritanopia (blue-blind)

#C30031

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b1312a;
/* rgb */ color: rgb(177, 49, 42);
/* oklch */ color: oklch(50.9% 0.166 27.8);

Tailwind

colors: {
  custom: {
    50: '#d17264',
    500: '#b1312a',
    950: '#000000',
  },
}

SCSS

$custom: #b1312a;
$custom-light: #d17264;
$custom-dark: #000000;

JSON

{
  "hex": "#b1312a",
  "rgb": {
    "r": 177,
    "g": 49,
    "b": 42
  },
  "hsl": {
    "h": 3.111,
    "s": 61.644,
    "l": 42.941
  },
  "oklch": {
    "l": 0.5089,
    "c": 0.16582,
    "h": 27.8
  },
  "luminance": 0.11711
}

Semantic roles & 50–950 ramp

primary

#B1312A

secondary

#70C2C6

accent

#DCE543

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160805

muted

#847B7A

Preview Lab

Preview with #B1312A

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

Preview Lab → · Contrast checker → · Palette generator →