Cool Blue

CSS

:root {
  --cool-blue: #4984b8;
  --cool-blue-rgb: 73 132 184;
  --cool-blue-oklch: oklch(0.596 0.101 247);
}

.element {
  color: var(--cool-blue);
  background-color: hsl(208 44% 50%);
  border-color: oklch(0.596 0.101 247);
}

Tailwind CSS v4

@theme {
  --color-cool-blue: #4984b8;
  --color-cool-blue-50: #e0f8ff;
  --color-cool-blue-100: #cfebff;
  --color-cool-blue-200: #b3d9fe;
  --color-cool-blue-300: #8fbce9;
  --color-cool-blue-400: #6ca4d7;
  --color-cool-blue-500: #498bc5;
  --color-cool-blue-600: #3f76a7;
  --color-cool-blue-700: #325f86;
  --color-cool-blue-800: #214663;
  --color-cool-blue-900: #163045;
  --color-cool-blue-950: #071c2d;
}

SCSS

$cool-blue: #4984b8;
$cool-blue-rgb: 73, 132, 184;
$cool-blue-light: mix(#fff, $cool-blue, 20%);
$cool-blue-dark: mix(#000, $cool-blue, 20%);

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