#49A3DA

CSS

:root {
  --high-blue: #49a3da;
  --high-blue-rgb: 73 163 218;
  --high-blue-oklch: oklch(0.684 0.118 238.7);
}

.element {
  color: var(--high-blue);
  background-color: hsl(203 66% 57%);
  border-color: oklch(0.684 0.118 238.7);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #49a3da;
  --color-high-blue-50: #d8faff;
  --color-high-blue-100: #c6eeff;
  --color-high-blue-200: #a7dcff;
  --color-high-blue-300: #7ec0ee;
  --color-high-blue-400: #54a8dc;
  --color-high-blue-500: #208fcb;
  --color-high-blue-600: #1f79ab;
  --color-high-blue-700: #196189;
  --color-high-blue-800: #0c4866;
  --color-high-blue-900: #083247;
  --color-high-blue-950: #001d2f;
}

SCSS

$high-blue: #49a3da;
$high-blue-rgb: 73, 163, 218;
$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);
}