#704FC1

CSS

:root {
  --purple-rain: #704fc1;
  --purple-rain-rgb: 112 79 193;
  --purple-rain-oklch: oklch(0.522 0.171 292.9);
}

.element {
  color: var(--purple-rain);
  background-color: hsl(257 48% 53%);
  border-color: oklch(0.522 0.171 292.9);
}

Tailwind CSS v4

@theme {
  --color-purple-rain: #704fc1;
  --color-purple-rain-50: #f8ecff;
  --color-purple-rain-100: #ebddff;
  --color-purple-rain-200: #d9c6ff;
  --color-purple-rain-300: #bea5ff;
  --color-purple-rain-400: #a388f9;
  --color-purple-rain-500: #8d69eb;
  --color-purple-rain-600: #775ac6;
  --color-purple-rain-700: #5f489f;
  --color-purple-rain-800: #443478;
  --color-purple-rain-900: #2f2455;
  --color-purple-rain-950: #1c1239;
}

SCSS

$purple-rain: #704fc1;
$purple-rain-rgb: 112, 79, 193;
$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);
}