Dark Side

CSS

:root {
  --dark-side: #004444;
  --dark-side-rgb: 0 68 68;
  --dark-side-oklch: oklch(0.35 0.06 194.8);
}

.element {
  color: var(--dark-side);
  background-color: hsl(180 100% 13%);
  border-color: oklch(0.35 0.06 194.8);
}

Tailwind CSS v4

@theme {
  --color-dark-side: #004444;
  --color-dark-side-50: #e2fbfb;
  --color-dark-side-100: #d2efef;
  --color-dark-side-200: #b8dddd;
  --color-dark-side-300: #94c1c2;
  --color-dark-side-400: #74aaa9;
  --color-dark-side-500: #539392;
  --color-dark-side-600: #477c7c;
  --color-dark-side-700: #396363;
  --color-dark-side-800: #284948;
  --color-dark-side-900: #1b3332;
  --color-dark-side-950: #0b1e1e;
}

SCSS

$dark-side: #004444;
$dark-side-rgb: 0, 68, 68;
$dark-side-light: mix(#fff, $dark-side, 20%);
$dark-side-dark: mix(#000, $dark-side, 20%);

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