#4C73C1

CSS

:root {
  --song-of-the-sea: #4c73c1;
  --song-of-the-sea-rgb: 76 115 193;
  --song-of-the-sea-oklch: oklch(0.564 0.129 262.9);
}

.element {
  color: var(--song-of-the-sea);
  background-color: hsl(220 49% 53%);
  border-color: oklch(0.564 0.129 262.9);
}

Tailwind CSS v4

@theme {
  --color-song-of-the-sea: #4c73c1;
  --color-song-of-the-sea-50: #e3f5ff;
  --color-song-of-the-sea-100: #d3e8ff;
  --color-song-of-the-sea-200: #b9d4ff;
  --color-song-of-the-sea-300: #97b6fa;
  --color-song-of-the-sea-400: #759deb;
  --color-song-of-the-sea-500: #5783db;
  --color-song-of-the-sea-600: #4a6fb9;
  --color-song-of-the-sea-700: #3b5994;
  --color-song-of-the-sea-800: #28416f;
  --color-song-of-the-sea-900: #1a2d4e;
  --color-song-of-the-sea-950: #0b1a34;
}

SCSS

$song-of-the-sea: #4c73c1;
$song-of-the-sea-rgb: 76, 115, 193;
$song-of-the-sea-light: mix(#fff, $song-of-the-sea, 20%);
$song-of-the-sea-dark: mix(#000, $song-of-the-sea, 20%);

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