Casual Blue

CSS

:root {
  --casual-blue: #498090;
  --casual-blue-rgb: 73 128 144;
  --casual-blue-oklch: oklch(0.568 0.063 218.7);
}

.element {
  color: var(--casual-blue);
  background-color: hsl(194 33% 43%);
  border-color: oklch(0.568 0.063 218.7);
}

Tailwind CSS v4

@theme {
  --color-casual-blue: #498090;
  --color-casual-blue-50: #e2faff;
  --color-casual-blue-100: #d2edf7;
  --color-casual-blue-200: #b8dbe7;
  --color-casual-blue-300: #94bfce;
  --color-casual-blue-400: #73a8b8;
  --color-casual-blue-500: #5290a2;
  --color-casual-blue-600: #477a89;
  --color-casual-blue-700: #38626e;
  --color-casual-blue-800: #274851;
  --color-casual-blue-900: #1a3238;
  --color-casual-blue-950: #0a1e23;
}

SCSS

$casual-blue: #498090;
$casual-blue-rgb: 73, 128, 144;
$casual-blue-light: mix(#fff, $casual-blue, 20%);
$casual-blue-dark: mix(#000, $casual-blue, 20%);

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