#C11BE0

CSS

:root {
  --trippy-velvet: #c11be0;
  --trippy-velvet-rgb: 193 27 224;
  --trippy-velvet-oklch: oklch(0.596 0.273 320.1);
}

.element {
  color: var(--trippy-velvet);
  background-color: hsl(291 78% 49%);
  border-color: oklch(0.596 0.273 320.1);
}

Tailwind CSS v4

@theme {
  --color-trippy-velvet: #c11be0;
  --color-trippy-velvet-50: #ffdbff;
  --color-trippy-velvet-100: #ffc9ff;
  --color-trippy-velvet-200: #ffaaff;
  --color-trippy-velvet-300: #f67fff;
  --color-trippy-velvet-400: #e154ff;
  --color-trippy-velvet-500: #cf00f2;
  --color-trippy-velvet-600: #af0acc;
  --color-trippy-velvet-700: #8c0ca4;
  --color-trippy-velvet-800: #67087d;
  --color-trippy-velvet-900: #480658;
  --color-trippy-velvet-950: #2f003c;
}

SCSS

$trippy-velvet: #c11be0;
$trippy-velvet-rgb: 193, 27, 224;
$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);
}