#583058

CSS

:root {
  --long-passionate-night: #583058;
  --long-passionate-night-rgb: 88 48 88;
  --long-passionate-night-oklch: oklch(0.376 0.083 327.1);
}

.element {
  color: var(--long-passionate-night);
  background-color: hsl(300 29% 27%);
  border-color: oklch(0.376 0.083 327.1);
}

Tailwind CSS v4

@theme {
  --color-long-passionate-night: #583058;
  --color-long-passionate-night-50: #ffedff;
  --color-long-passionate-night-100: #f8dff6;
  --color-long-passionate-night-200: #e9c8e6;
  --color-long-passionate-night-300: #d0a9cc;
  --color-long-passionate-night-400: #b98db8;
  --color-long-passionate-night-500: #a472a3;
  --color-long-passionate-night-600: #8a618a;
  --color-long-passionate-night-700: #6f4d6e;
  --color-long-passionate-night-800: #513852;
  --color-long-passionate-night-900: #382639;
  --color-long-passionate-night-950: #231524;
}

SCSS

$long-passionate-night: #583058;
$long-passionate-night-rgb: 88, 48, 88;
$long-passionate-night-light: mix(#fff, $long-passionate-night, 20%);
$long-passionate-night-dark: mix(#000, $long-passionate-night, 20%);

.element {
  color: $long-passionate-night;
  box-shadow: 0 0 0 2px rgba($long-passionate-night, 0.35);
}