#8651C7

CSS

:root {
  --purple-rain: #8651c7;
  --purple-rain-rgb: 134 81 199;
  --purple-rain-oklch: oklch(0.552 0.178 301.5);
}

.element {
  color: var(--purple-rain);
  background-color: hsl(267 51% 55%);
  border-color: oklch(0.552 0.178 301.5);
}

Tailwind CSS v4

@theme {
  --color-purple-rain: #8651c7;
  --color-purple-rain-50: #ffe9ff;
  --color-purple-rain-100: #f4daff;
  --color-purple-rain-200: #e4c2ff;
  --color-purple-rain-300: #cb9fff;
  --color-purple-rain-400: #b281f5;
  --color-purple-rain-500: #9d61e6;
  --color-purple-rain-600: #8453c2;
  --color-purple-rain-700: #6a429c;
  --color-purple-rain-800: #4c3076;
  --color-purple-rain-900: #352153;
  --color-purple-rain-950: #200f38;
}

SCSS

$purple-rain: #8651c7;
$purple-rain-rgb: 134, 81, 199;
$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);
}