Spinning Blue

CSS

:root {
  --spinning-blue: #5b6a7c;
  --spinning-blue-rgb: 91 106 124;
  --spinning-blue-oklch: oklch(0.519 0.034 253.1);
}

.element {
  color: var(--spinning-blue);
  background-color: hsl(213 15% 42%);
  border-color: oklch(0.519 0.034 253.1);
}

Tailwind CSS v4

@theme {
  --color-spinning-blue: #5b6a7c;
  --color-spinning-blue-50: #eff6ff;
  --color-spinning-blue-100: #e1e9f3;
  --color-spinning-blue-200: #cbd5e3;
  --color-spinning-blue-300: #acb9c9;
  --color-spinning-blue-400: #91a0b3;
  --color-spinning-blue-500: #77889d;
  --color-spinning-blue-600: #657384;
  --color-spinning-blue-700: #505c6a;
  --color-spinning-blue-800: #3a434e;
  --color-spinning-blue-900: #282f36;
  --color-spinning-blue-950: #161b21;
}

SCSS

$spinning-blue: #5b6a7c;
$spinning-blue-rgb: 91, 106, 124;
$spinning-blue-light: mix(#fff, $spinning-blue, 20%);
$spinning-blue-dark: mix(#000, $spinning-blue, 20%);

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