Rising Tide

CSS

:root {
  --rising-tide: #cbd6d8;
  --rising-tide-rgb: 203 214 216;
  --rising-tide-oklch: oklch(0.868 0.012 209.8);
}

.element {
  color: var(--rising-tide);
  background-color: hsl(189 14% 82%);
  border-color: oklch(0.868 0.012 209.8);
}

Tailwind CSS v4

@theme {
  --color-rising-tide: #cbd6d8;
  --color-rising-tide-50: #f1f6f7;
  --color-rising-tide-100: #e3e9ea;
  --color-rising-tide-200: #cfd6d7;
  --color-rising-tide-300: #b1b9bb;
  --color-rising-tide-400: #97a1a2;
  --color-rising-tide-500: #7d898b;
  --color-rising-tide-600: #6a7475;
  --color-rising-tide-700: #555c5e;
  --color-rising-tide-800: #3e4445;
  --color-rising-tide-900: #2a2f2f;
  --color-rising-tide-950: #181b1c;
}

SCSS

$rising-tide: #cbd6d8;
$rising-tide-rgb: 203, 214, 216;
$rising-tide-light: mix(#fff, $rising-tide, 20%);
$rising-tide-dark: mix(#000, $rising-tide, 20%);

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