#5A62C7

CSS

:root {
  --savoy-blue: #5a62c7;
  --savoy-blue-rgb: 90 98 199;
  --savoy-blue-oklch: oklch(0.542 0.155 276.5);
}

.element {
  color: var(--savoy-blue);
  background-color: hsl(236 49% 57%);
  border-color: oklch(0.542 0.155 276.5);
}

Tailwind CSS v4

@theme {
  --color-savoy-blue: #5a62c7;
  --color-savoy-blue-50: #eaf2ff;
  --color-savoy-blue-100: #dce4ff;
  --color-savoy-blue-200: #c5ceff;
  --color-savoy-blue-300: #a6afff;
  --color-savoy-blue-400: #8794f8;
  --color-savoy-blue-500: #6e78ea;
  --color-savoy-blue-600: #5d66c5;
  --color-savoy-blue-700: #4a519f;
  --color-savoy-blue-800: #333c77;
  --color-savoy-blue-900: #232954;
  --color-savoy-blue-950: #121638;
}

SCSS

$savoy-blue: #5a62c7;
$savoy-blue-rgb: 90, 98, 199;
$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);
}