#B1303B#B1303B

#B1303B is a mid, vivid red. Relative luminance 0.118; OKLCH L 51.0% C 0.165 H 20.8°. Best body text is #FFFFFF at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#B1303B
RGB	rgb(177, 48, 59)
HSL	hsl(355, 57%, 44%)
HSV	hsv(355, 73%, 69%)
CMYK	cmyk(0%, 72.9%, 66.7%, 30.6%)
CIE-LAB	lab(40.86, 52.19, 24.75)
CIE-LCH	lch(40.86, 57.76, 25.37°)
OKLab	oklab(51.05% 0.1541 0.0585)
OKLCH	oklch(51.05% 0.165 20.8)
XYZ	xyz(19.9800, 11.7797, 5.3585)
Luminance	0.1178 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1303B #30B1A6

analogous

#B1307C #B1303B #B16630

triadic

#B1303B #3BB130 #303BB1

tetradic

#B1303B #7CB130 #30B1A6 #6630B1

square

#B1303B #7CB130 #30B1A6 #6630B1

split-complementary

#B1303B #30B166 #307CB1

monochromatic

#51161B #81232B #B1303B #CF4F5A #DC7F87

Accessibility & contrast

On white

6.26

#B1303B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#B1303B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B1303B

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1303B	#FFFFFF	#000000	##FFFFFF
##B1303B	1.00	6.26	3.36	6.26
#FFFFFF	6.26	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544F3A

Deuteranopia (green-blind)

#756A37

Tritanopia (blue-blind)

#C20035

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b1303b;
/* rgb */ color: rgb(177, 48, 59);
/* oklch */ color: oklch(51.0% 0.165 20.8);

Tailwind

colors: {
  custom: {
    50: '#d07270',
    500: '#b1303b',
    950: '#000000',
  },
}

SCSS

$custom: #b1303b;
$custom-light: #d07270;
$custom-dark: #000000;

JSON

{
  "hex": "#b1303b",
  "rgb": {
    "r": 177,
    "g": 48,
    "b": 59
  },
  "hsl": {
    "h": 354.884,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.51046,
    "c": 0.16482,
    "h": 20.8
  },
  "luminance": 0.11777
}

Semantic roles & 50–950 ramp

primary

#B1303B

secondary

#78C5BF

accent

#E1D447

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150807

muted

#837B7A

Preview Lab

Preview with #B1303B

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

Preview Lab → · Contrast checker → · Palette generator →