#48A3D9

CSS

:root {
  --high-blue: #48a3d9;
  --high-blue-rgb: 72 163 217;
  --high-blue-oklch: oklch(0.683 0.117 238);
}

.element {
  color: var(--high-blue);
  background-color: hsl(202 66% 57%);
  border-color: oklch(0.683 0.117 238);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #48a3d9;
  --color-high-blue-50: #d8fbff;
  --color-high-blue-100: #c5eeff;
  --color-high-blue-200: #a7dcff;
  --color-high-blue-300: #7ec0ee;
  --color-high-blue-400: #54a8db;
  --color-high-blue-500: #1e90ca;
  --color-high-blue-600: #1e7aab;
  --color-high-blue-700: #186189;
  --color-high-blue-800: #0b4865;
  --color-high-blue-900: #073247;
  --color-high-blue-950: #001e2e;
}

SCSS

$high-blue: #48a3d9;
$high-blue-rgb: 72, 163, 217;
$high-blue-light: mix(#fff, $high-blue, 20%);
$high-blue-dark: mix(#000, $high-blue, 20%);

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