#8750C8

CSS

:root {
  --purple-rain: #8750c8;
  --purple-rain-rgb: 135 80 200;
  --purple-rain-oklch: oklch(0.552 0.181 301.9);
}

.element {
  color: var(--purple-rain);
  background-color: hsl(268 52% 55%);
  border-color: oklch(0.552 0.181 301.9);
}

Tailwind CSS v4

@theme {
  --color-purple-rain: #8750c8;
  --color-purple-rain-50: #ffe9ff;
  --color-purple-rain-100: #f5daff;
  --color-purple-rain-200: #e5c1ff;
  --color-purple-rain-300: #cb9fff;
  --color-purple-rain-400: #b381f6;
  --color-purple-rain-500: #9e60e7;
  --color-purple-rain-600: #8552c3;
  --color-purple-rain-700: #6b419d;
  --color-purple-rain-800: #4d3076;
  --color-purple-rain-900: #352054;
  --color-purple-rain-950: #210f38;
}

SCSS

$purple-rain: #8750c8;
$purple-rain-rgb: 135, 80, 200;
$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);
}