#7F54C9

CSS

:root {
  --purple-rain: #7f54c9;
  --purple-rain-rgb: 127 84 201;
  --purple-rain-oklch: oklch(0.55 0.175 297.3);
}

.element {
  color: var(--purple-rain);
  background-color: hsl(262 52% 56%);
  border-color: oklch(0.55 0.175 297.3);
}

Tailwind CSS v4

@theme {
  --color-purple-rain: #7f54c9;
  --color-purple-rain-50: #fcebff;
  --color-purple-rain-100: #f0dcff;
  --color-purple-rain-200: #dfc4ff;
  --color-purple-rain-300: #c4a2ff;
  --color-purple-rain-400: #ab85f8;
  --color-purple-rain-500: #9565e9;
  --color-purple-rain-600: #7e56c5;
  --color-purple-rain-700: #65459e;
  --color-purple-rain-800: #483277;
  --color-purple-rain-900: #322254;
  --color-purple-rain-950: #1e1139;
}

SCSS

$purple-rain: #7f54c9;
$purple-rain-rgb: 127, 84, 201;
$purple-rain-light: mix(#fff, $purple-rain, 20%);
$purple-rain-dark: mix(#000, $purple-rain, 20%);

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