Blue Ember

CSS

:root {
  --blue-ember: #51529c;
  --blue-ember-rgb: 81 82 156;
  --blue-ember-oklch: oklch(0.475 0.117 280.4);
}

.element {
  color: var(--blue-ember);
  background-color: hsl(239 32% 46%);
  border-color: oklch(0.475 0.117 280.4);
}

Tailwind CSS v4

@theme {
  --color-blue-ember: #51529c;
  --color-blue-ember-50: #eff2ff;
  --color-blue-ember-100: #e1e4ff;
  --color-blue-ember-200: #cccfff;
  --color-blue-ember-300: #aeb0f2;
  --color-blue-ember-400: #9196e2;
  --color-blue-ember-500: #787bd2;
  --color-blue-ember-600: #6669b1;
  --color-blue-ember-700: #51548e;
  --color-blue-ember-800: #393d6a;
  --color-blue-ember-900: #272a4b;
  --color-blue-ember-950: #161731;
}

SCSS

$blue-ember: #51529c;
$blue-ember-rgb: 81, 82, 156;
$blue-ember-light: mix(#fff, $blue-ember, 20%);
$blue-ember-dark: mix(#000, $blue-ember, 20%);

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