#496EA0

CSS

:root {
  --song-of-the-sea: #496ea0;
  --song-of-the-sea-rgb: 73 110 160;
  --song-of-the-sea-oklch: oklch(0.533 0.09 256.2);
}

.element {
  color: var(--song-of-the-sea);
  background-color: hsl(214 37% 46%);
  border-color: oklch(0.533 0.09 256.2);
}

Tailwind CSS v4

@theme {
  --color-song-of-the-sea: #496ea0;
  --color-song-of-the-sea-50: #e6f7ff;
  --color-song-of-the-sea-100: #d6e9ff;
  --color-song-of-the-sea-200: #bdd6fb;
  --color-song-of-the-sea-300: #9bb9e6;
  --color-song-of-the-sea-400: #7ba1d3;
  --color-song-of-the-sea-500: #5e88c1;
  --color-song-of-the-sea-600: #5073a3;
  --color-song-of-the-sea-700: #405c83;
  --color-song-of-the-sea-800: #2c4461;
  --color-song-of-the-sea-900: #1e2f44;
  --color-song-of-the-sea-950: #0e1b2c;
}

SCSS

$song-of-the-sea: #496ea0;
$song-of-the-sea-rgb: 73, 110, 160;
$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);
}