#486172

CSS

:root {
  --seven-seas: #486172;
  --seven-seas-rgb: 72 97 114;
  --seven-seas-oklch: oklch(0.479 0.041 238.4);
}

.element {
  color: var(--seven-seas);
  background-color: hsl(204 23% 36%);
  border-color: oklch(0.479 0.041 238.4);
}

Tailwind CSS v4

@theme {
  --color-seven-seas: #486172;
  --color-seven-seas-50: #ebf7ff;
  --color-seven-seas-100: #dceaf4;
  --color-seven-seas-200: #c5d7e4;
  --color-seven-seas-300: #a6bbcb;
  --color-seven-seas-400: #89a2b4;
  --color-seven-seas-500: #6d8b9e;
  --color-seven-seas-600: #5d7586;
  --color-seven-seas-700: #4a5e6b;
  --color-seven-seas-800: #35454f;
  --color-seven-seas-900: #243037;
  --color-seven-seas-950: #131c22;
}

SCSS

$seven-seas: #486172;
$seven-seas-rgb: 72, 97, 114;
$seven-seas-light: mix(#fff, $seven-seas, 20%);
$seven-seas-dark: mix(#000, $seven-seas, 20%);

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