#6A61B5

CSS

:root {
  --simply-purple: #6a61b5;
  --simply-purple-rgb: 106 97 181;
  --simply-purple-oklch: oklch(0.541 0.128 286.2);
}

.element {
  color: var(--simply-purple);
  background-color: hsl(246 36% 55%);
  border-color: oklch(0.541 0.128 286.2);
}

Tailwind CSS v4

@theme {
  --color-simply-purple: #6a61b5;
  --color-simply-purple-50: #f3f0ff;
  --color-simply-purple-100: #e5e2ff;
  --color-simply-purple-200: #d1ccff;
  --color-simply-purple-300: #b4adf6;
  --color-simply-purple-400: #9892e6;
  --color-simply-purple-500: #8077d6;
  --color-simply-purple-600: #6d65b5;
  --color-simply-purple-700: #575191;
  --color-simply-purple-800: #3e3b6d;
  --color-simply-purple-900: #2a294d;
  --color-simply-purple-950: #181633;
}

SCSS

$simply-purple: #6a61b5;
$simply-purple-rgb: 106, 97, 181;
$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);
}