#864FCD

CSS

:root {
  --purple-rain: #864fcd;
  --purple-rain-rgb: 134 79 205;
  --purple-rain-oklch: oklch(0.553 0.188 300.5);
}

.element {
  color: var(--purple-rain);
  background-color: hsl(266 56% 56%);
  border-color: oklch(0.553 0.188 300.5);
}

Tailwind CSS v4

@theme {
  --color-purple-rain: #864fcd;
  --color-purple-rain-50: #ffe9ff;
  --color-purple-rain-100: #f4d9ff;
  --color-purple-rain-200: #e4c1ff;
  --color-purple-rain-300: #ca9eff;
  --color-purple-rain-400: #b180fb;
  --color-purple-rain-500: #9c5fed;
  --color-purple-rain-600: #8451c8;
  --color-purple-rain-700: #6a41a1;
  --color-purple-rain-800: #4c2f79;
  --color-purple-rain-900: #352056;
  --color-purple-rain-950: #200e3a;
}

SCSS

$purple-rain: #864fcd;
$purple-rain-rgb: 134, 79, 205;
$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);
}