#6F5FB6

CSS

:root {
  --simply-purple: #6f5fb6;
  --simply-purple-rgb: 111 95 182;
  --simply-purple-oklch: oklch(0.542 0.132 289.7);
}

.element {
  color: var(--simply-purple);
  background-color: hsl(251 37% 54%);
  border-color: oklch(0.542 0.132 289.7);
}

Tailwind CSS v4

@theme {
  --color-simply-purple: #6f5fb6;
  --color-simply-purple-50: #f5efff;
  --color-simply-purple-100: #e8e1ff;
  --color-simply-purple-200: #d4cbff;
  --color-simply-purple-300: #b8abf6;
  --color-simply-purple-400: #9d90e7;
  --color-simply-purple-500: #8674d7;
  --color-simply-purple-600: #7163b5;
  --color-simply-purple-700: #5a4f92;
  --color-simply-purple-800: #403a6d;
  --color-simply-purple-900: #2c284d;
  --color-simply-purple-950: #1a1533;
}

SCSS

$simply-purple: #6f5fb6;
$simply-purple-rgb: 111, 95, 182;
$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);
}