#B0303A#B0303A

#B0303A is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.9% C 0.164 H 21.1°. Best body text is #FFFFFF at 6.31:1 contrast (WCAG AA passes).

Color values

HEX	#B0303A
RGB	rgb(176, 48, 58)
HSL	hsl(355, 57%, 44%)
HSV	hsv(355, 73%, 69%)
CMYK	cmyk(0%, 72.7%, 67%, 31%)
CIE-LAB	lab(40.66, 51.82, 25.07)
CIE-LCH	lch(40.66, 57.56, 25.81°)
OKLab	oklab(50.85% 0.1528 0.0591)
OKLCH	oklch(50.85% 0.164 21.1)
XYZ	xyz(19.7273, 11.6524, 5.2126)
Luminance	0.1165 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B0303A #30B0A6

analogous

#B0307A #B0303A #B06630

triadic

#B0303A #3AB030 #303AB0

tetradic

#B0303A #7AB030 #30B0A6 #6630B0

square

#B0303A #7AB030 #30B0A6 #6630B0

split-complementary

#B0303A #30B066 #307AB0

monochromatic

#50161A #80232A #B0303A #CF4E58 #DC7E86

Accessibility & contrast

On white

6.31

#B0303A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#B0303A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B0303A

6.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B0303A	#FFFFFF	#000000	##FFFFFF
##B0303A	1.00	6.31	3.33	6.31
#FFFFFF	6.31	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544E39

Deuteranopia (green-blind)

#746A36

Tritanopia (blue-blind)

#C10035

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b0303a;
/* rgb */ color: rgb(176, 48, 58);
/* oklch */ color: oklch(50.9% 0.164 21.1);

Tailwind

colors: {
  custom: {
    50: '#cf7270',
    500: '#b0303a',
    950: '#000000',
  },
}

SCSS

$custom: #b0303a;
$custom-light: #cf7270;
$custom-dark: #000000;

JSON

{
  "hex": "#b0303a",
  "rgb": {
    "r": 176,
    "g": 48,
    "b": 58
  },
  "hsl": {
    "h": 355.313,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.50853,
    "c": 0.16386,
    "h": 21.1
  },
  "luminance": 0.11649
}

Semantic roles & 50–950 ramp

primary

#B0303A

secondary

#77C5BF

accent

#E0D447

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150807

muted

#837B7A

Preview Lab

Preview with #B0303A

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

Preview Lab → · Contrast checker → · Palette generator →