#007779

CSS

:root {
  --prismarine: #007779;
  --prismarine-rgb: 0 119 121;
  --prismarine-oklch: oklch(0.516 0.088 196.8);
}

.element {
  color: var(--prismarine);
  background-color: hsl(181 100% 24%);
  border-color: oklch(0.516 0.088 196.8);
}

Tailwind CSS v4

@theme {
  --color-prismarine: #007779;
  --color-prismarine-50: #d9fdff;
  --color-prismarine-100: #c7f1f3;
  --color-prismarine-200: #a8e0e2;
  --color-prismarine-300: #80c6c8;
  --color-prismarine-400: #58afb0;
  --color-prismarine-500: #25989a;
  --color-prismarine-600: #238082;
  --color-prismarine-700: #1c6768;
  --color-prismarine-800: #124c4c;
  --color-prismarine-900: #0c3535;
  --color-prismarine-950: #002020;
}

SCSS

$prismarine: #007779;
$prismarine-rgb: 0, 119, 121;
$prismarine-light: mix(#fff, $prismarine, 20%);
$prismarine-dark: mix(#000, $prismarine, 20%);

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