#B5303F#B5303F

#B5303F is a mid, vivid red. Relative luminance 0.123; OKLCH L 51.8% C 0.169 H 19.4°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#B5303F
RGB	rgb(181, 48, 63)
HSL	hsl(353, 58%, 45%)
HSV	hsv(353, 73%, 71%)
CMYK	cmyk(0%, 73.5%, 65.2%, 29%)
CIE-LAB	lab(41.69, 53.67, 23.49)
CIE-LCH	lch(41.69, 58.59, 23.63°)
OKLab	oklab(51.82% 0.1591 0.056)
OKLCH	oklch(51.82% 0.169 19.4)
XYZ	xyz(21.0124, 12.2996, 5.9693)
Luminance	0.1230 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B5303F #30B5A6

analogous

#B53082 #B5303F #B56330

triadic

#B5303F #3FB530 #303FB5

tetradic

#B5303F #82B530 #30B5A6 #6330B5

square

#B5303F #82B530 #30B5A6 #6330B5

split-complementary

#B5303F #30B563 #3082B5

monochromatic

#54161D #85232E #B5303F #D15160 #DE828C

Accessibility & contrast

On white

6.07

#B5303F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#B5303F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B5303F

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B5303F	#FFFFFF	#000000	##FFFFFF
##B5303F	1.00	6.07	3.46	6.07
#FFFFFF	6.07	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#55503F

Deuteranopia (green-blind)

#776D3B

Tritanopia (blue-blind)

#C70037

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b5303f;
/* rgb */ color: rgb(181, 48, 63);
/* oklch */ color: oklch(51.8% 0.169 19.4);

Tailwind

colors: {
  custom: {
    50: '#d37374',
    500: '#b5303f',
    950: '#000000',
  },
}

SCSS

$custom: #b5303f;
$custom-light: #d37374;
$custom-dark: #000000;

JSON

{
  "hex": "#b5303f",
  "rgb": {
    "r": 181,
    "g": 48,
    "b": 63
  },
  "hsl": {
    "h": 353.233,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.51819,
    "c": 0.16868,
    "h": 19.4
  },
  "luminance": 0.12297
}

Semantic roles & 50–950 ramp

primary

#B5303F

secondary

#7AC7BE

accent

#E1D046

background

#FDF7F7

surface

#FBEDED

border

#D4C8C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B5303F

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

Preview Lab → · Contrast checker → · Palette generator →