#655FC4

CSS

:root {
  --simply-purple: #655fc4;
  --simply-purple-rgb: 101 95 196;
  --simply-purple-oklch: oklch(0.542 0.153 282.7);
}

.element {
  color: var(--simply-purple);
  background-color: hsl(244 46% 57%);
  border-color: oklch(0.542 0.153 282.7);
}

Tailwind CSS v4

@theme {
  --color-simply-purple: #655fc4;
  --color-simply-purple-50: #f0f0ff;
  --color-simply-purple-100: #e2e2ff;
  --color-simply-purple-200: #cdccff;
  --color-simply-purple-300: #afacff;
  --color-simply-purple-400: #9291f5;
  --color-simply-purple-500: #7a74e7;
  --color-simply-purple-600: #6763c2;
  --color-simply-purple-700: #524f9c;
  --color-simply-purple-800: #3a3a75;
  --color-simply-purple-900: #282853;
  --color-simply-purple-950: #161537;
}

SCSS

$simply-purple: #655fc4;
$simply-purple-rgb: 101, 95, 196;
$simply-purple-light: mix(#fff, $simply-purple, 20%);
$simply-purple-dark: mix(#000, $simply-purple, 20%);

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