#B4303B#B4303B

#B4303B is a mid, vivid red. Relative luminance 0.121; OKLCH L 51.6% C 0.168 H 21.0°. Best body text is #FFFFFF at 6.13:1 contrast (WCAG AA passes).

Color values

HEX	#B4303B
RGB	rgb(180, 48, 59)
HSL	hsl(355, 58%, 45%)
HSV	hsv(355, 73%, 71%)
CMYK	cmyk(0%, 73.3%, 67.2%, 29.4%)
CIE-LAB	lab(41.43, 53.14, 25.58)
CIE-LCH	lch(41.43, 58.97, 25.71°)
OKLab	oklab(51.57% 0.1567 0.0602)
OKLCH	oklch(51.57% 0.168 21)
XYZ	xyz(20.6710, 12.1360, 5.3909)
Luminance	0.1213 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4303B #30B4A9

analogous

#B4307D #B4303B #B46730

triadic

#B4303B #3BB430 #303BB4

tetradic

#B4303B #7DB430 #30B4A9 #6730B4

square

#B4303B #7DB430 #30B4A9 #6730B4

split-complementary

#B4303B #30B467 #307DB4

monochromatic

#53161B #84232B #B4303B #D1515B #DD8189

Accessibility & contrast

On white

6.13

#B4303B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.43

#B4303B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4303B

6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4303B	#FFFFFF	#000000	##FFFFFF
##B4303B	1.00	6.13	3.43	6.13
#FFFFFF	6.13	1.00	21.00	1.00
#000000	3.43	21.00	1.00	21.00
##FFFFFF	6.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#55503A

Deuteranopia (green-blind)

#776C37

Tritanopia (blue-blind)

#C60035

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b4303b;
/* rgb */ color: rgb(180, 48, 59);
/* oklch */ color: oklch(51.6% 0.168 21.0);

Tailwind

colors: {
  custom: {
    50: '#d27271',
    500: '#b4303b',
    950: '#000000',
  },
}

SCSS

$custom: #b4303b;
$custom-light: #d27271;
$custom-dark: #000000;

JSON

{
  "hex": "#b4303b",
  "rgb": {
    "r": 180,
    "g": 48,
    "b": 59
  },
  "hsl": {
    "h": 355,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51572,
    "c": 0.16788,
    "h": 21
  },
  "luminance": 0.12133
}

Semantic roles & 50–950 ramp

primary

#B4303B

secondary

#79C6C0

accent

#E1D447

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B4303B

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

Preview Lab → · Contrast checker → · Palette generator →