#53355B

CSS

:root {
  --long-passionate-night: #53355b;
  --long-passionate-night-rgb: 83 53 91;
  --long-passionate-night-oklch: oklch(0.38 0.073 319);
}

.element {
  color: var(--long-passionate-night);
  background-color: hsl(287 26% 28%);
  border-color: oklch(0.38 0.073 319);
}

Tailwind CSS v4

@theme {
  --color-long-passionate-night: #53355b;
  --color-long-passionate-night-50: #ffefff;
  --color-long-passionate-night-100: #f4e0f7;
  --color-long-passionate-night-200: #e3cbe8;
  --color-long-passionate-night-300: #c9accf;
  --color-long-passionate-night-400: #b191ba;
  --color-long-passionate-night-500: #9b77a5;
  --color-long-passionate-night-600: #83658c;
  --color-long-passionate-night-700: #695070;
  --color-long-passionate-night-800: #4d3a53;
  --color-long-passionate-night-900: #35283a;
  --color-long-passionate-night-950: #201624;
}

SCSS

$long-passionate-night: #53355b;
$long-passionate-night-rgb: 83, 53, 91;
$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);
}