#45A3D8

CSS

:root {
  --high-blue: #45a3d8;
  --high-blue-rgb: 69 163 216;
  --high-blue-oklch: oklch(0.682 0.118 236.9);
}

.element {
  color: var(--high-blue);
  background-color: hsl(202 65% 56%);
  border-color: oklch(0.682 0.118 236.9);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #45a3d8;
  --color-high-blue-50: #d7fbff;
  --color-high-blue-100: #c5eeff;
  --color-high-blue-200: #a6dcff;
  --color-high-blue-300: #7dc0ed;
  --color-high-blue-400: #51a8db;
  --color-high-blue-500: #1890ca;
  --color-high-blue-600: #197aaa;
  --color-high-blue-700: #156289;
  --color-high-blue-800: #084865;
  --color-high-blue-900: #063247;
  --color-high-blue-950: #001e2e;
}

SCSS

$high-blue: #45a3d8;
$high-blue-rgb: 69, 163, 216;
$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);
}