#ACB7DE

CSS

:root {
  --over-the-moon: #acb7de;
  --over-the-moon-rgb: 172 183 222;
  --over-the-moon-oklch: oklch(0.784 0.057 272.7);
}

.element {
  color: var(--over-the-moon);
  background-color: hsl(227 43% 77%);
  border-color: oklch(0.784 0.057 272.7);
}

Tailwind CSS v4

@theme {
  --color-over-the-moon: #acb7de;
  --color-over-the-moon-50: #f0f4ff;
  --color-over-the-moon-100: #e2e7fc;
  --color-over-the-moon-200: #cdd3ed;
  --color-over-the-moon-300: #aeb6d5;
  --color-over-the-moon-400: #939dc1;
  --color-over-the-moon-500: #7984ad;
  --color-over-the-moon-600: #677092;
  --color-over-the-moon-700: #525975;
  --color-over-the-moon-800: #3b4256;
  --color-over-the-moon-900: #282d3c;
  --color-over-the-moon-950: #161a26;
}

SCSS

$over-the-moon: #acb7de;
$over-the-moon-rgb: 172, 183, 222;
$over-the-moon-light: mix(#fff, $over-the-moon, 20%);
$over-the-moon-dark: mix(#000, $over-the-moon, 20%);

.element {
  color: $over-the-moon;
  box-shadow: 0 0 0 2px rgba($over-the-moon, 0.35);
}