#BE34D5

CSS

:root {
  --trippy-velvet: #be34d5;
  --trippy-velvet-rgb: 190 52 213;
  --trippy-velvet-oklch: oklch(0.599 0.246 321.4);
}

.element {
  color: var(--trippy-velvet);
  background-color: hsl(291 66% 52%);
  border-color: oklch(0.599 0.246 321.4);
}

Tailwind CSS v4

@theme {
  --color-trippy-velvet: #be34d5;
  --color-trippy-velvet-50: #ffdeff;
  --color-trippy-velvet-100: #ffccff;
  --color-trippy-velvet-200: #ffafff;
  --color-trippy-velvet-300: #f286fe;
  --color-trippy-velvet-400: #dd5ff3;
  --color-trippy-velvet-500: #ca2ae4;
  --color-trippy-velvet-600: #ab28c1;
  --color-trippy-velvet-700: #89209b;
  --color-trippy-velvet-800: #651676;
  --color-trippy-velvet-900: #470f53;
  --color-trippy-velvet-950: #2e0138;
}

SCSS

$trippy-velvet: #be34d5;
$trippy-velvet-rgb: 190, 52, 213;
$trippy-velvet-light: mix(#fff, $trippy-velvet, 20%);
$trippy-velvet-dark: mix(#000, $trippy-velvet, 20%);

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