#6361C2

CSS

:root {
  --savoy-blue: #6361c2;
  --savoy-blue-rgb: 99 97 194;
  --savoy-blue-oklch: oklch(0.543 0.147 281.2);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(241 44% 57%);
  border-color: oklch(0.543 0.147 281.2);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #6361c2;
  --color-savoy-blue-50: #eff1ff;
  --color-savoy-blue-100: #e0e2ff;
  --color-savoy-blue-200: #cbcdff;
  --color-savoy-blue-300: #adadff;
  --color-savoy-blue-400: #9092f3;
  --color-savoy-blue-500: #7876e4;
  --color-savoy-blue-600: #6564c0;
  --color-savoy-blue-700: #51509b;
  --color-savoy-blue-800: #393b74;
  --color-savoy-blue-900: #272852;
  --color-savoy-blue-950: #151637;
}

SCSS

$savoy-blue: #6361c2;
$savoy-blue-rgb: 99, 97, 194;
$savoy-blue-light: mix(#fff, $savoy-blue, 20%);
$savoy-blue-dark: mix(#000, $savoy-blue, 20%);

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