#457477

CSS

:root {
  --ocean-slumber: #457477;
  --ocean-slumber-rgb: 69 116 119;
  --ocean-slumber-oklch: oklch(0.527 0.052 200.9);
}

.element {
  color: var(--ocean-slumber);
  background-color: hsl(184 27% 37%);
  border-color: oklch(0.527 0.052 200.9);
}

Tailwind CSS v4

@theme {
  --color-ocean-slumber: #457477;
  --color-ocean-slumber-50: #e5fafc;
  --color-ocean-slumber-100: #d5edef;
  --color-ocean-slumber-200: #bcdbde;
  --color-ocean-slumber-300: #99c0c3;
  --color-ocean-slumber-400: #7aa8ab;
  --color-ocean-slumber-500: #5c9194;
  --color-ocean-slumber-600: #4e7a7d;
  --color-ocean-slumber-700: #3e6264;
  --color-ocean-slumber-800: #2c4849;
  --color-ocean-slumber-900: #1e3233;
  --color-ocean-slumber-950: #0e1e1e;
}

SCSS

$ocean-slumber: #457477;
$ocean-slumber-rgb: 69, 116, 119;
$ocean-slumber-light: mix(#fff, $ocean-slumber, 20%);
$ocean-slumber-dark: mix(#000, $ocean-slumber, 20%);

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