#300135

CSS

:root {
  --dark-purple: #300135;
  --dark-purple-rgb: 48 1 53;
  --dark-purple-oklch: oklch(0.222 0.102 323.8);
}

.element {
  color: var(--dark-purple);
  background-color: hsl(294 96% 11%);
  border-color: oklch(0.222 0.102 323.8);
}

Tailwind CSS v4

@theme {
  --color-dark-purple: #300135;
  --color-dark-purple-50: #ffecff;
  --color-dark-purple-100: #fbddfb;
  --color-dark-purple-200: #ecc6ec;
  --color-dark-purple-300: #d3a6d4;
  --color-dark-purple-400: #bc8ac1;
  --color-dark-purple-500: #a76eac;
  --color-dark-purple-600: #8d5d92;
  --color-dark-purple-700: #714a75;
  --color-dark-purple-800: #533657;
  --color-dark-purple-900: #3a253d;
  --color-dark-purple-950: #241327;
}

SCSS

$dark-purple: #300135;
$dark-purple-rgb: 48, 1, 53;
$dark-purple-light: mix(#fff, $dark-purple, 20%);
$dark-purple-dark: mix(#000, $dark-purple, 20%);

.element {
  color: $dark-purple;
  box-shadow: 0 0 0 2px rgba($dark-purple, 0.35);
}