#B0303B#B0303B

#B0303B is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.9% C 0.164 H 20.7°. Best body text is #FFFFFF at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#B0303B
RGB	rgb(176, 48, 59)
HSL	hsl(355, 57%, 44%)
HSV	hsv(355, 73%, 69%)
CMYK	cmyk(0%, 72.7%, 66.5%, 31%)
CIE-LAB	lab(40.67, 51.88, 24.47)
CIE-LCH	lch(40.67, 57.36, 25.25°)
OKLab	oklab(50.87% 0.1532 0.0579)
OKLCH	oklch(50.87% 0.164 20.7)
XYZ	xyz(19.7530, 11.6627, 5.3478)
Luminance	0.1166 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B0303B #30B0A5

analogous

#B0307B #B0303B #B06530

triadic

#B0303B #3BB030 #303BB0

tetradic

#B0303B #7BB030 #30B0A5 #6530B0

square

#B0303B #7BB030 #30B0A5 #6530B0

split-complementary

#B0303B #30B065 #307BB0

monochromatic

#50161B #80232B #B0303B #CF4E59 #DC7E86

Accessibility & contrast

On white

6.30

#B0303B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#B0303B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B0303B

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B0303B	#FFFFFF	#000000	##FFFFFF
##B0303B	1.00	6.30	3.33	6.30
#FFFFFF	6.30	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544F3A

Deuteranopia (green-blind)

#746A37

Tritanopia (blue-blind)

#C10035

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b0303b;
/* rgb */ color: rgb(176, 48, 59);
/* oklch */ color: oklch(50.9% 0.164 20.7);

Tailwind

colors: {
  custom: {
    50: '#cf7270',
    500: '#b0303b',
    950: '#000000',
  },
}

SCSS

$custom: #b0303b;
$custom-light: #cf7270;
$custom-dark: #000000;

JSON

{
  "hex": "#b0303b",
  "rgb": {
    "r": 176,
    "g": 48,
    "b": 59
  },
  "hsl": {
    "h": 354.844,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.50871,
    "c": 0.1638,
    "h": 20.7
  },
  "luminance": 0.1166
}

Semantic roles & 50–950 ramp

primary

#B0303B

secondary

#77C5BE

accent

#E0D347

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150807

muted

#837B7A

Preview Lab

Preview with #B0303B

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

Preview Lab → · Contrast checker → · Palette generator →