#2F3571

CSS

:root {
  --good-karma: #2f3571;
  --good-karma-rgb: 47 53 113;
  --good-karma-oklch: oklch(0.358 0.102 275.7);
}

.element {
  color: var(--good-karma);
  background-color: hsl(235 41% 31%);
  border-color: oklch(0.358 0.102 275.7);
}

Tailwind CSS v4

@theme {
  --color-good-karma: #2f3571;
  --color-good-karma-50: #edf3ff;
  --color-good-karma-100: #dfe5ff;
  --color-good-karma-200: #c9d1ff;
  --color-good-karma-300: #aab3ec;
  --color-good-karma-400: #8d99db;
  --color-good-karma-500: #747fc9;
  --color-good-karma-600: #626caa;
  --color-good-karma-700: #4e5689;
  --color-good-karma-800: #373f66;
  --color-good-karma-900: #262c47;
  --color-good-karma-950: #14192f;
}

SCSS

$good-karma: #2f3571;
$good-karma-rgb: 47, 53, 113;
$good-karma-light: mix(#fff, $good-karma, 20%);
$good-karma-dark: mix(#000, $good-karma, 20%);

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