#B1303A#B1303A

#B1303A is a mid, vivid red. Relative luminance 0.118; OKLCH L 51.0% C 0.165 H 21.2°. Best body text is #FFFFFF at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#B1303A
RGB	rgb(177, 48, 58)
HSL	hsl(355, 57%, 44%)
HSV	hsv(355, 73%, 69%)
CMYK	cmyk(0%, 72.9%, 67.2%, 30.6%)
CIE-LAB	lab(40.85, 52.14, 25.34)
CIE-LCH	lch(40.85, 57.97, 25.92°)
OKLab	oklab(51.03% 0.1537 0.0597)
OKLCH	oklch(51.03% 0.165 21.2)
XYZ	xyz(19.9543, 11.7695, 5.2232)
Luminance	0.1177 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1303A #30B1A7

analogous

#B1307B #B1303A #B16730

triadic

#B1303A #3AB130 #303AB1

tetradic

#B1303A #7BB130 #30B1A7 #6730B1

square

#B1303A #7BB130 #30B1A7 #6730B1

split-complementary

#B1303A #30B167 #307BB1

monochromatic

#51161A #81232A #B1303A #CF4F59 #DC7F86

Accessibility & contrast

On white

6.26

#B1303A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#B1303A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B1303A

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1303A	#FFFFFF	#000000	##FFFFFF
##B1303A	1.00	6.26	3.35	6.26
#FFFFFF	6.26	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544F39

Deuteranopia (green-blind)

#756A36

Tritanopia (blue-blind)

#C20035

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b1303a;
/* rgb */ color: rgb(177, 48, 58);
/* oklch */ color: oklch(51.0% 0.165 21.2);

Tailwind

colors: {
  custom: {
    50: '#d07270',
    500: '#b1303a',
    950: '#000000',
  },
}

SCSS

$custom: #b1303a;
$custom-light: #d07270;
$custom-dark: #000000;

JSON

{
  "hex": "#b1303a",
  "rgb": {
    "r": 177,
    "g": 48,
    "b": 58
  },
  "hsl": {
    "h": 355.349,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.51029,
    "c": 0.16489,
    "h": 21.2
  },
  "luminance": 0.11767
}

Semantic roles & 50–950 ramp

primary

#B1303A

secondary

#78C5BF

accent

#E1D547

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150807

muted

#837B7A

Preview Lab

Preview with #B1303A

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

Preview Lab → · Contrast checker → · Palette generator →