#7A57C6

CSS

:root {
  --simply-purple: #7a57c6;
  --simply-purple-rgb: 122 87 198;
  --simply-purple-oklch: oklch(0.548 0.166 294.9);
}

.element {
  color: var(--simply-purple);
  background-color: hsl(259 49% 56%);
  border-color: oklch(0.548 0.166 294.9);
}

Tailwind CSS v4

@theme {
  --color-simply-purple: #7a57c6;
  --color-simply-purple-50: #f9ecff;
  --color-simply-purple-100: #edddff;
  --color-simply-purple-200: #dbc6ff;
  --color-simply-purple-300: #c0a5ff;
  --color-simply-purple-400: #a688f5;
  --color-simply-purple-500: #9069e7;
  --color-simply-purple-600: #7a5ac3;
  --color-simply-purple-700: #61489c;
  --color-simply-purple-800: #463476;
  --color-simply-purple-900: #302453;
  --color-simply-purple-950: #1d1238;
}

SCSS

$simply-purple: #7a57c6;
$simply-purple-rgb: 122, 87, 198;
$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);
}